diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index c02499f222ff..103450f78f37 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -827,10 +827,6 @@ def wrapObjectTemplate(templateBody, nullValue, isDefinitelyObject, type,
         elif isArgument:
             descriptorType = descriptor.argumentType
 
-        if descriptor.interface.isConsequential():
-            raise TypeError("Consequential interface %s being used as an "
-                            "argument" % descriptor.interface.identifier.name)
-
         if failureCode is None:
             substitutions = {
                 "sourceDescription": sourceDescription,
diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index bde6e71bcfb3..1d50c3ed4f73 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -38,11 +38,6 @@ def __init__(self, filename, parseData):
             iface = thing
             self.interfaces[iface.identifier.name] = iface
             if iface.identifier.name not in config:
-                # Completely skip consequential interfaces with no descriptor
-                # if they have no interface object because chances are we
-                # don't need to do anything interesting with them.
-                if iface.isConsequential() and not iface.hasInterfaceObject():
-                    continue
                 entry = {}
             else:
                 entry = config[iface.identifier.name]
diff --git a/components/script/dom/bindings/codegen/parser/WebIDL.py b/components/script/dom/bindings/codegen/parser/WebIDL.py
index 5e8b958e3de2..a36b1b3ecfe5 100644
--- a/components/script/dom/bindings/codegen/parser/WebIDL.py
+++ b/components/script/dom/bindings/codegen/parser/WebIDL.py
@@ -154,6 +154,9 @@ def isInterface(self):
     def isNamespace(self):
         return False
 
+    def isInterfaceMixin(self):
+        return False
+
     def isEnum(self):
         return False
 
@@ -233,8 +236,6 @@ def __init__(self, location, parentScope, identifier):
         # A mapping from global name to the set of global interfaces
         # that have that global name.
         self.globalNameMapping = defaultdict(set)
-        self.primaryGlobalAttr = None
-        self.primaryGlobalName = None
 
     def __str__(self):
         return self.QName()
@@ -462,8 +463,17 @@ def finish(self, scope):
                 raise WebIDLError("Unknown [Exposed] value %s" % globalName,
                                   [self._location])
 
-        if len(self._exposureGlobalNames) == 0:
-            self._exposureGlobalNames.add(scope.primaryGlobalName)
+        # Verify that we are exposed _somwhere_ if we have some place to be
+        # exposed.  We don't want to assert that we're definitely exposed
+        # because a lot of our parser tests have small-enough IDL snippets that
+        # they don't include any globals, and we don't really want to go through
+        # and add global interfaces and [Exposed] annotations to all those
+        # tests.
+        if len(scope.globalNames) != 0:
+            if (len(self._exposureGlobalNames) == 0):
+                raise WebIDLError(("'%s' is not exposed anywhere even though we have "
+                                   "globals to be exposed to") % self,
+                                  [self.location])
 
         globalNameSetToExposureSet(scope, self._exposureGlobalNames,
                                    self.exposureSet)
@@ -508,17 +518,15 @@ def getWorkerDebuggerExposureSet(self):
         return workerDebuggerScopes.intersection(self.exposureSet)
 
 
-class IDLExternalInterface(IDLObjectWithIdentifier, IDLExposureMixins):
+class IDLExternalInterface(IDLObjectWithIdentifier):
     def __init__(self, location, parentScope, identifier):
         assert isinstance(identifier, IDLUnresolvedIdentifier)
         assert isinstance(parentScope, IDLScope)
         self.parent = None
         IDLObjectWithIdentifier.__init__(self, location, parentScope, identifier)
-        IDLExposureMixins.__init__(self, location)
         IDLObjectWithIdentifier.resolve(self, parentScope)
 
     def finish(self, scope):
-        IDLExposureMixins.finish(self, scope)
         pass
 
     def validate(self):
@@ -533,9 +541,6 @@ def isExternal(self):
     def isInterface(self):
         return True
 
-    def isConsequential(self):
-        return False
-
     def addExtendedAttributes(self, attrs):
         if len(attrs) != 0:
             raise WebIDLError("There are no extended attributes that are "
@@ -554,9 +559,6 @@ def isJSImplemented(self):
     def hasProbablyShortLivingWrapper(self):
         return False
 
-    def isSerializable(self):
-        return False
-
     def _getDependentObjects(self):
         return set()
 
@@ -718,6 +720,7 @@ def typeName(self):
             return "interface"
         if self.isNamespace():
             return "namespace"
+        assert self.isInterfaceMixin()
         return "interface mixin"
 
     def getExtendedAttribute(self, name):
@@ -770,10 +773,13 @@ def finishMembers(self, scope):
         # sets, make sure they aren't exposed in places where we are not.
         for member in self.members:
             if not member.exposureSet.issubset(self.exposureSet):
-                raise WebIDLError("Interface or interface mixin member has"
+                raise WebIDLError("Interface or interface mixin member has "
                                   "larger exposure set than its container",
                                   [member.location, self.location])
 
+    def isExternal(self):
+        return False
+
 
 class IDLInterfaceMixin(IDLInterfaceOrInterfaceMixinOrNamespace):
     def __init__(self, location, parentScope, name, members, isKnownNonPartial):
@@ -788,6 +794,9 @@ def __init__(self, location, parentScope, name, members, isKnownNonPartial):
     def __str__(self):
         return "Interface mixin '%s'" % self.identifier.name
 
+    def isInterfaceMixin(self):
+        return True
+
     def finish(self, scope):
         if self._finished:
             return
@@ -796,8 +805,10 @@ def finish(self, scope):
         # Expose to the globals of interfaces that includes this mixin if this
         # mixin has no explicit [Exposed] so that its members can be exposed
         # based on the base interface exposure set.
-        # Make sure this is done before IDLExposureMixins.finish call to
-        # prevent exposing to PrimaryGlobal by default.
+        #
+        # Make sure this is done before IDLExposureMixins.finish call, since
+        # that converts our set of exposure global names to an actual exposure
+        # set.
         hasImplicitExposure = len(self._exposureGlobalNames) == 0
         if hasImplicitExposure:
             self._exposureGlobalNames.update(self.actualExposureGlobalNames)
@@ -876,16 +887,11 @@ def __init__(self, location, parentScope, name, parent, members,
         # them.
         self.namedConstructors = list()
         self.legacyWindowAliases = []
-        self.implementedInterfaces = set()
         self.includedMixins = set()
-        self._consequential = False
         # self.interfacesBasedOnSelf is the set of interfaces that inherit from
-        # self or have self as a consequential interface, including self itself.
+        # self, including self itself.
         # Used for distinguishability checking.
         self.interfacesBasedOnSelf = set([self])
-        # self.interfacesImplementingSelf is the set of interfaces that directly
-        # have self as a consequential interface
-        self.interfacesImplementingSelf = set()
         self._hasChildInterfaces = False
         self._isOnGlobalProtoChain = False
         # Tracking of the number of reserved slots we need for our
@@ -896,6 +902,10 @@ def __init__(self, location, parentScope, name, parent, members,
         # If this is an iterator interface, we need to know what iterable
         # interface we're iterating for in order to get its nativeType.
         self.iterableInterface = None
+        # True if we have cross-origin members.
+        self.hasCrossOriginMembers = False
+        # True if some descendant (including ourselves) has cross-origin members
+        self.hasDescendantWithCrossOriginMembers = False
 
         self.toStringTag = toStringTag
 
@@ -996,10 +1006,8 @@ def finish(self, scope):
 
             self.totalMembersInSlots = self.parent.totalMembersInSlots
 
-            # Interfaces with [Global] or [PrimaryGlobal] must not
-            # have anything inherit from them
-            if (self.parent.getExtendedAttribute("Global") or
-                self.parent.getExtendedAttribute("PrimaryGlobal")):
+            # Interfaces with [Global] must not have anything inherit from them
+            if self.parent.getExtendedAttribute("Global"):
                 # Note: This is not a self.parent.isOnGlobalProtoChain() check
                 # because ancestors of a [Global] interface can have other
                 # descendants.
@@ -1015,10 +1023,8 @@ def finish(self, scope):
                                    self.parent.identifier.name),
                                   [self.location, self.parent.location])
 
-            # Callbacks must not inherit from non-callbacks or inherit from
-            # anything that has consequential interfaces.
+            # Callbacks must not inherit from non-callbacks.
             # XXXbz Can non-callbacks inherit from callbacks?  Spec issue pending.
-            # XXXbz Can callbacks have consequential interfaces?  Spec issue pending
             if self.isCallback():
                 if not self.parent.isCallback():
                     raise WebIDLError("Callback interface %s inheriting from "
@@ -1055,23 +1061,14 @@ def finish(self, scope):
                                    self.parent.identifier.name),
                                   [self.location, self.parent.location])
 
-        for iface in self.implementedInterfaces:
-            iface.finish(scope)
         for mixin in self.includedMixins:
             mixin.finish(scope)
 
         cycleInGraph = self.findInterfaceLoopPoint(self)
         if cycleInGraph:
-            raise WebIDLError("Interface %s has itself as ancestor or "
-                              "implemented interface" % self.identifier.name,
-                              [self.location, cycleInGraph.location])
-
-        if self.isCallback():
-            # "implements" should have made sure we have no
-            # consequential interfaces.
-            assert len(self.getConsequentialInterfaces()) == 0
-            # And that we're not consequential.
-            assert not self.isConsequential()
+            raise WebIDLError(
+                "Interface %s has itself as ancestor" % self.identifier.name,
+                [self.location, cycleInGraph.location])
 
         self.finishMembers(scope)
 
@@ -1104,7 +1101,7 @@ def finish(self, scope):
             if self.globalNames:
                 raise WebIDLError(
                     "Can't have both a named constructor and [Global]",
-                    [self.location, self.namedConstructors.location])
+                    [self.location, ctor.location])
             assert len(ctor._exposureGlobalNames) == 0
             ctor._exposureGlobalNames.update(self._exposureGlobalNames)
             ctor.finish(scope)
@@ -1114,43 +1111,15 @@ def finish(self, scope):
         # admixed.
         self.originalMembers = list(self.members)
 
-        # Import everything from our consequential interfaces into
-        # self.members.  Sort our consequential interfaces by name
-        # just so we have a consistent order.
-        for iface in sorted(self.getConsequentialInterfaces(),
+        for mixin in sorted(self.includedMixins,
                             key=lambda x: x.identifier.name):
-            # Flag the interface as being someone's consequential interface
-            iface.setIsConsequentialInterfaceOf(self)
-            # Verify that we're not exposed somewhere where iface is not exposed
-            if not self.exposureSet.issubset(iface.exposureSet):
-                raise WebIDLError("Interface %s is exposed in globals where its "
-                                  "consequential interface %s is not exposed." %
-                                  (self.identifier.name, iface.identifier.name),
-                                  [self.location, iface.location])
-
-            # If we have a maplike or setlike, and the consequential interface
-            # also does, throw an error.
-            if iface.maplikeOrSetlikeOrIterable and self.maplikeOrSetlikeOrIterable:
-                raise WebIDLError("Maplike/setlike/iterable interface %s cannot have "
-                                  "maplike/setlike/iterable interface %s as a "
-                                  "consequential interface" %
-                                  (self.identifier.name,
-                                   iface.identifier.name),
-                                  [self.maplikeOrSetlikeOrIterable.location,
-                                   iface.maplikeOrSetlikeOrIterable.location])
-            additionalMembers = iface.originalMembers
-            for additionalMember in additionalMembers:
+            for mixinMember in mixin.members:
                 for member in self.members:
-                    if additionalMember.identifier.name == member.identifier.name:
+                    if mixinMember.identifier.name == member.identifier.name:
                         raise WebIDLError(
-                            "Multiple definitions of %s on %s coming from 'implements' statements" %
+                            "Multiple definitions of %s on %s coming from 'includes' statements" %
                             (member.identifier.name, self),
-                            [additionalMember.location, member.location])
-            self.members.extend(additionalMembers)
-            iface.interfacesImplementingSelf.add(self)
-
-        for mixin in sorted(self.includedMixins,
-                            key=lambda x: x.identifier.name):
+                            [mixinMember.location, member.location])
             self.members.extend(mixin.members)
 
         for ancestor in self.getInheritedInterfaces():
@@ -1164,8 +1133,6 @@ def finish(self, scope):
                                    ancestor.identifier.name),
                                   [self.maplikeOrSetlikeOrIterable.location,
                                    ancestor.maplikeOrSetlikeOrIterable.location])
-            for ancestorConsequential in ancestor.getConsequentialInterfaces():
-                ancestorConsequential.interfacesBasedOnSelf.add(self)
 
         # Deal with interfaces marked [Unforgeable], now that we have our full
         # member list, except unforgeables pulled in from parents.  We want to
@@ -1199,6 +1166,21 @@ def finish(self, scope):
                 not hasattr(member, "originatingInterface")):
                 member.originatingInterface = self
 
+        for member in self.members:
+            if ((member.isMethod() and
+                 member.getExtendedAttribute("CrossOriginCallable")) or
+                (member.isAttr() and
+                 (member.getExtendedAttribute("CrossOriginReadable") or
+                  member.getExtendedAttribute("CrossOriginWritable")))):
+                self.hasCrossOriginMembers = True
+                break
+
+        if self.hasCrossOriginMembers:
+            parent = self
+            while parent:
+                parent.hasDescendantWithCrossOriginMembers = True
+                parent = parent.parent
+
         # Compute slot indices for our members before we pull in unforgeable
         # members from our parent. Also, maplike/setlike declarations get a
         # slot to hold their backing object.
@@ -1221,13 +1203,12 @@ def finish(self, scope):
                     self._ownMembersInSlots += 1
 
         if self.parent:
-            # Make sure we don't shadow any of the [Unforgeable] attributes on
-            # our ancestor interfaces.  We don't have to worry about
-            # consequential interfaces here, because those have already been
-            # imported into the relevant .members lists.  And we don't have to
-            # worry about anything other than our parent, because it has already
-            # imported its ancestors unforgeable attributes into its member
-            # list.
+            # Make sure we don't shadow any of the [Unforgeable] attributes on our
+            # ancestor interfaces.  We don't have to worry about mixins here, because
+            # those have already been imported into the relevant .members lists.  And
+            # we don't have to worry about anything other than our parent, because it
+            # has already imported its ancestors' unforgeable attributes into its
+            # member list.
             for unforgeableMember in (member for member in self.parent.members if
                                       (member.isAttr() or member.isMethod()) and
                                       member.isUnforgeable()):
@@ -1363,17 +1344,6 @@ def checkDuplicateNames(member, name, attributeName):
                                       (attributeName, name),
                                       [member.location, m.location])
 
-        # We don't support consequential unforgeable interfaces.  Need to check
-        # this here, because in finish() an interface might not know yet that
-        # it's consequential.
-        if self.getExtendedAttribute("Unforgeable") and self.isConsequential():
-            raise WebIDLError(
-                "%s is an unforgeable consequential interface" %
-                self.identifier.name,
-                [self.location] +
-                list(i.location for i in
-                     (self.interfacesBasedOnSelf - {self})))
-
         # We also don't support inheriting from unforgeable interfaces.
         if self.getExtendedAttribute("Unforgeable") and self.hasChildInterfaces():
             locations = ([self.location] +
@@ -1529,16 +1499,6 @@ def checkDuplicateNames(member, name, attributeName):
                               'an integer-typed "length" attribute',
                               [self.location, indexedGetter.location])
 
-    def isExternal(self):
-        return False
-
-    def setIsConsequentialInterfaceOf(self, other):
-        self._consequential = True
-        self.interfacesBasedOnSelf.add(other)
-
-    def isConsequential(self):
-        return self._consequential
-
     def setCallback(self, value):
         self._callback = value
 
@@ -1553,8 +1513,6 @@ def isSingleOperationInterface(self):
             not self.isJSImplemented() and
             # Not inheriting from another interface
             not self.parent and
-            # No consequential interfaces
-            len(self.getConsequentialInterfaces()) == 0 and
             # No attributes of any kinds
             not any(m.isAttr() for m in self.members) and
             # There is at least one regular operation, and all regular
@@ -1582,10 +1540,6 @@ def hasInterfacePrototypeObject(self):
         return (not self.isCallback() and not self.isNamespace()
                 and self.getUserData('hasConcreteDescendant', False))
 
-    def addImplementedInterface(self, implementedInterface):
-        assert(isinstance(implementedInterface, IDLInterface))
-        self.implementedInterfaces.add(implementedInterface)
-
     def addIncludedMixin(self, includedMixin):
         assert(isinstance(includedMixin, IDLInterfaceMixin))
         self.includedMixins.add(includedMixin)
@@ -1603,27 +1557,10 @@ def getInheritedInterfaces(self):
         parentInterfaces.insert(0, self.parent)
         return parentInterfaces
 
-    def getConsequentialInterfaces(self):
-        assert(self._finished)
-        # The interfaces we implement directly
-        consequentialInterfaces = set(self.implementedInterfaces)
-
-        # And their inherited interfaces
-        for iface in self.implementedInterfaces:
-            consequentialInterfaces |= set(iface.getInheritedInterfaces())
-
-        # And now collect up the consequential interfaces of all of those
-        temp = set()
-        for iface in consequentialInterfaces:
-            temp |= iface.getConsequentialInterfaces()
-
-        return consequentialInterfaces | temp
-
     def findInterfaceLoopPoint(self, otherInterface):
         """
-        Finds an interface, amongst our ancestors and consequential interfaces,
-        that inherits from otherInterface or implements otherInterface
-        directly.  If there is no such interface, returns None.
+        Finds an interface amongst our ancestors that inherits from otherInterface.
+        If there is no such interface, returns None.
         """
         if self.parent:
             if self.parent == otherInterface:
@@ -1631,13 +1568,8 @@ def findInterfaceLoopPoint(self, otherInterface):
             loopPoint = self.parent.findInterfaceLoopPoint(otherInterface)
             if loopPoint:
                 return loopPoint
-        if otherInterface in self.implementedInterfaces:
-            return self
-        for iface in self.implementedInterfaces:
-            loopPoint = iface.findInterfaceLoopPoint(otherInterface)
-            if loopPoint:
-                return loopPoint
         return None
+
     def setNonPartial(self, location, parent, members):
         assert not parent or isinstance(parent, IDLIdentifierPlaceholder)
         IDLInterfaceOrInterfaceMixinOrNamespace.setNonPartial(self, location, members)
@@ -1671,7 +1603,6 @@ def isOnGlobalProtoChain(self):
 
     def _getDependentObjects(self):
         deps = set(self.members)
-        deps.update(self.implementedInterfaces)
         deps.update(self.includedMixins)
         if self.parent:
             deps.add(self.parent)
@@ -1794,20 +1725,6 @@ def addExtendedAttributes(self, attrs):
                 self.parentScope.addIfaceGlobalNames(self.identifier.name,
                                                      self.globalNames)
                 self._isOnGlobalProtoChain = True
-            elif identifier == "PrimaryGlobal":
-                if not attr.noArguments():
-                    raise WebIDLError("[PrimaryGlobal] must take no arguments",
-                                      [attr.location])
-                if self.parentScope.primaryGlobalAttr is not None:
-                    raise WebIDLError(
-                        "[PrimaryGlobal] specified twice",
-                        [attr.location,
-                         self.parentScope.primaryGlobalAttr.location])
-                self.parentScope.primaryGlobalAttr = attr
-                self.parentScope.primaryGlobalName = self.identifier.name
-                self.parentScope.addIfaceGlobalNames(self.identifier.name,
-                                                     [self.identifier.name])
-                self._isOnGlobalProtoChain = True
             elif identifier == "LegacyWindowAlias":
                 if attr.hasValue():
                     self.legacyWindowAliases = [attr.value()]
@@ -3081,8 +2998,9 @@ def isExposedInAllOf(self, exposureSet):
             return True
         iface = self.inner
         if iface.isExternal():
-            # Let's say true, though ideally we'd only do this when
-            # exposureSet contains the primary global's name.
+            # Let's say true, so we don't have to implement exposure mixins on
+            # external interfaces and sprinkle [Exposed=Window] on every single
+            # external interface declaration.
             return True
         return iface.exposureSet.issuperset(exposureSet)
 
@@ -3865,10 +3783,6 @@ def getExtendedAttribute(self, name):
         return self._extendedAttrDict.get(name, None)
 
     def finish(self, scope):
-        # We better be exposed _somewhere_.
-        if (len(self._exposureGlobalNames) == 0):
-            print(self.identifier.name)
-        assert len(self._exposureGlobalNames) != 0
         IDLExposureMixins.finish(self, scope)
 
     def validate(self):
@@ -5539,52 +5453,6 @@ def reallyInit(self, parentInterface):
             [IDLExtendedAttribute(self.location, ("NewObject",))])
 
 
-class IDLImplementsStatement(IDLObject):
-    def __init__(self, location, implementor, implementee):
-        IDLObject.__init__(self, location)
-        self.implementor = implementor
-        self.implementee = implementee
-        self._finished = False
-
-    def finish(self, scope):
-        if self._finished:
-            return
-        assert(isinstance(self.implementor, IDLIdentifierPlaceholder))
-        assert(isinstance(self.implementee, IDLIdentifierPlaceholder))
-        implementor = self.implementor.finish(scope)
-        implementee = self.implementee.finish(scope)
-        # NOTE: we depend on not setting self.implementor and
-        # self.implementee here to keep track of the original
-        # locations.
-        if not isinstance(implementor, IDLInterface):
-            raise WebIDLError("Left-hand side of 'implements' is not an "
-                              "interface",
-                              [self.implementor.location])
-        if implementor.isCallback():
-            raise WebIDLError("Left-hand side of 'implements' is a callback "
-                              "interface",
-                              [self.implementor.location])
-        if not isinstance(implementee, IDLInterface):
-            raise WebIDLError("Right-hand side of 'implements' is not an "
-                              "interface",
-                              [self.implementee.location])
-        if implementee.isCallback():
-            raise WebIDLError("Right-hand side of 'implements' is a callback "
-                              "interface",
-                              [self.implementee.location])
-        implementor.addImplementedInterface(implementee)
-        self.implementor = implementor
-        self.implementee = implementee
-
-    def validate(self):
-        pass
-
-    def addExtendedAttributes(self, attrs):
-        if len(attrs) != 0:
-            raise WebIDLError("There are no extended attributes that are "
-                              "allowed on implements statements",
-                              [attrs[0].location, self.location])
-
 class IDLIncludesStatement(IDLObject):
     def __init__(self, location, interface, mixin):
         IDLObject.__init__(self, location)
@@ -5606,16 +5474,18 @@ def finish(self, scope):
         if not isinstance(interface, IDLInterface):
             raise WebIDLError("Left-hand side of 'includes' is not an "
                               "interface",
-                              [self.interface.location])
+                              [self.interface.location, interface.location])
         if interface.isCallback():
             raise WebIDLError("Left-hand side of 'includes' is a callback "
                               "interface",
-                              [self.interface.location])
+                              [self.interface.location, interface.location])
         if not isinstance(mixin, IDLInterfaceMixin):
             raise WebIDLError("Right-hand side of 'includes' is not an "
                               "interface mixin",
-                              [self.mixin.location])
+                              [self.mixin.location, mixin.location])
+
         mixin.actualExposureGlobalNames.update(interface._exposureGlobalNames)
+
         interface.addIncludedMixin(mixin)
         self.interface = interface
         self.mixin = mixin
@@ -5721,7 +5591,6 @@ def t_OTHER(self, t):
         return t
 
     keywords = {
-        "module": "MODULE",
         "interface": "INTERFACE",
         "partial": "PARTIAL",
         "mixin": "MIXIN",
@@ -5730,7 +5599,6 @@ def t_OTHER(self, t):
         "enum": "ENUM",
         "callback": "CALLBACK",
         "typedef": "TYPEDEF",
-        "implements": "IMPLEMENTS",
         "includes": "INCLUDES",
         "const": "CONST",
         "null": "NULL",
@@ -5894,7 +5762,6 @@ def p_Definition(self, p):
                        | Exception
                        | Enum
                        | Typedef
-                       | ImplementsStatement
                        | IncludesStatement
         """
         p[0] = p[1]
@@ -6427,16 +6294,6 @@ def p_Typedef(self, p):
                              p[2], p[3])
         p[0] = typedef
 
-    def p_ImplementsStatement(self, p):
-        """
-            ImplementsStatement : ScopedName IMPLEMENTS ScopedName SEMICOLON
-        """
-        assert(p[2] == "implements")
-        implementor = IDLIdentifierPlaceholder(self.getLocation(p, 1), p[1])
-        implementee = IDLIdentifierPlaceholder(self.getLocation(p, 3), p[3])
-        p[0] = IDLImplementsStatement(self.getLocation(p, 1), implementor,
-                                      implementee)
-
     def p_IncludesStatement(self, p):
         """
             IncludesStatement : ScopedName INCLUDES ScopedName SEMICOLON
@@ -6898,7 +6755,6 @@ def p_ArgumentName(self, p):
                          | ENUM
                          | EXCEPTION
                          | GETTER
-                         | IMPLEMENTS
                          | INHERIT
                          | INTERFACE
                          | ITERABLE
@@ -7025,11 +6881,9 @@ def p_Other(self, p):
                   | FALSE
                   | FLOAT
                   | GETTER
-                  | IMPLEMENTS
                   | INHERIT
                   | INTERFACE
                   | LONG
-                  | MODULE
                   | NULL
                   | OBJECT
                   | OCTET
@@ -7479,12 +7333,6 @@ def __init__(self, outputdir='', lexer=None):
 
         self._globalScope = IDLScope(BuiltinLocation("<Global Scope>"), None, None)
 
-        # To make our test harness work, pretend like we have a primary global already.
-        # Note that we _don't_ set _globalScope.primaryGlobalAttr,
-        # so we'll still be able to detect multiple PrimaryGlobal extended attributes.
-        self._globalScope.primaryGlobalName = "FakeTestPrimaryGlobal"
-        self._globalScope.addIfaceGlobalNames("FakeTestPrimaryGlobal", ["FakeTestPrimaryGlobal"])
-
         self._installBuiltins(self._globalScope)
         self._productions = []
 
@@ -7568,20 +7416,13 @@ def simpleExtendedAttr(str):
                 self._productions.append(itr_iface)
                 iterable.iteratorType = IDLWrapperType(iface.location, itr_iface)
 
-        # Then, finish all the IDLImplementsStatements.  In particular, we
-        # have to make sure we do those before we do the IDLInterfaces.
-        # XXX khuey hates this bit and wants to nuke it from orbit.
-        implementsStatements = [p for p in self._productions if
-                                isinstance(p, IDLImplementsStatement)]
         # Make sure we finish IDLIncludesStatements before we finish the
         # IDLInterfaces.
+        # XXX khuey hates this bit and wants to nuke it from orbit.
         includesStatements = [p for p in self._productions if
                                 isinstance(p, IDLIncludesStatement)]
         otherStatements = [p for p in self._productions if
-                           not isinstance(p, (IDLImplementsStatement,
-                                              IDLIncludesStatement))]
-        for production in implementsStatements:
-            production.finish(self.globalScope())
+                           not isinstance(p, IDLIncludesStatement)]
         for production in includesStatements:
             production.finish(self.globalScope())
         for production in otherStatements:
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_constructor_global.py b/components/script/dom/bindings/codegen/parser/tests/test_constructor_global.py
index c469d56e8179..31c5d95317f5 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_constructor_global.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_constructor_global.py
@@ -1,8 +1,10 @@
+import traceback
+
 def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global]
+            [Global, Exposed=TestConstructorGlobal]
             interface TestConstructorGlobal {
               constructor();
             };
@@ -18,7 +20,8 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global, NamedConstructor=FooBar]
+            [Global, Exposed=TestNamedConstructorGlobal,
+             NamedConstructor=FooBar]
             interface TestNamedConstructorGlobal {
             };
         """)
@@ -32,7 +35,8 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [NamedConstructor=FooBar, Global]
+            [NamedConstructor=FooBar, Global,
+             Exposed=TestNamedConstructorGlobal]
             interface TestNamedConstructorGlobal {
             };
         """)
@@ -46,7 +50,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global, HTMLConstructor]
+            [Global, HTMLConstructor, Exposed=TestHTMLConstructorGlobal]
             interface TestHTMLConstructorGlobal {
             };
         """)
@@ -61,7 +65,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [HTMLConstructor, Global]
+            [HTMLConstructor, Global, Exposed=TestHTMLConstructorGlobal]
             interface TestHTMLConstructorGlobal {
             };
         """)
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_dictionary.py b/components/script/dom/bindings/codegen/parser/tests/test_dictionary.py
index cff049bea15d..3cad3022389a 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_dictionary.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_dictionary.py
@@ -736,3 +736,17 @@ def WebIDLTest(parser, harness):
         threw = True
 
     harness.ok(threw, "Only unrestricted values can be initialized to NaN")
+
+    parser = parser.reset();
+    threw = False
+    try:
+        parser.parse("""
+            dictionary Foo {
+              long module;
+            };
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(not threw, "Should be able to use 'module' as a dictionary member name")
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_distinguishability.py b/components/script/dom/bindings/codegen/parser/tests/test_distinguishability.py
index 8d18b26cf2d0..bd9996e34c9f 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_distinguishability.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_distinguishability.py
@@ -59,8 +59,6 @@ def WebIDLTest(parser, harness):
         void passKid(Kid arg);
         void passParent(Parent arg);
         void passGrandparent(Grandparent arg);
-        void passImplemented(Implemented arg);
-        void passImplementedParent(ImplementedParent arg);
         void passUnrelated1(Unrelated1 arg);
         void passUnrelated2(Unrelated2 arg);
         void passArrayBuffer(ArrayBuffer arg);
@@ -70,9 +68,6 @@ def WebIDLTest(parser, harness):
       interface Kid : Parent {};
       interface Parent : Grandparent {};
       interface Grandparent {};
-      interface Implemented : ImplementedParent {};
-      Parent implements Implemented;
-      interface ImplementedParent {};
       interface Unrelated1 {};
       interface Unrelated2 {};
     """)
@@ -156,8 +151,7 @@ def WebIDLTest(parser, harness):
     argTypes = [ "long", "short", "long?", "short?", "boolean",
                  "boolean?", "DOMString", "ByteString", "Enum", "Enum2",
                  "Interface", "Interface?",
-                 "AncestorInterface", "UnrelatedInterface",
-                 "ImplementedInterface", "CallbackInterface",
+                 "AncestorInterface", "UnrelatedInterface", "CallbackInterface",
                  "CallbackInterface?", "CallbackInterface2",
                  "object", "Callback", "Callback2", "Dict",
                  "Dict2", "sequence<long>", "sequence<short>",
@@ -190,7 +184,7 @@ def allBut(list1, list2):
     bufferSourceTypes = ["ArrayBuffer", "ArrayBufferView", "Uint8Array", "Uint16Array"]
     sharedBufferSourceTypes = ["SharedArrayBuffer"]
     interfaces = [ "Interface", "Interface?", "AncestorInterface",
-                   "UnrelatedInterface", "ImplementedInterface" ] + bufferSourceTypes + sharedBufferSourceTypes
+                   "UnrelatedInterface" ] + bufferSourceTypes + sharedBufferSourceTypes
     nullables = (["long?", "short?", "boolean?", "Interface?",
                   "CallbackInterface?", "Dict", "Dict2",
                   "Date?", "any", "Promise<any>?"] +
@@ -230,7 +224,6 @@ def setDistinguishable(type, types):
     setDistinguishable("AncestorInterface", notRelatedInterfaces)
     setDistinguishable("UnrelatedInterface",
                        allBut(argTypes, ["object", "UnrelatedInterface"]))
-    setDistinguishable("ImplementedInterface", notRelatedInterfaces)
     setDistinguishable("CallbackInterface", nonUserObjects)
     setDistinguishable("CallbackInterface?", allBut(nonUserObjects, nullables))
     setDistinguishable("CallbackInterface2", nonUserObjects)
@@ -272,8 +265,6 @@ def checkDistinguishability(parser, type1, type2):
           interface Interface : AncestorInterface {};
           interface AncestorInterface {};
           interface UnrelatedInterface {};
-          interface ImplementedInterface {};
-          Interface implements ImplementedInterface;
           callback interface CallbackInterface {};
           callback interface CallbackInterface2 {};
           callback Callback = any();
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_exposed_extended_attribute.py b/components/script/dom/bindings/codegen/parser/tests/test_exposed_extended_attribute.py
index a6c04e30caf5..e0241a564261 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_exposed_extended_attribute.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_exposed_extended_attribute.py
@@ -2,9 +2,9 @@
 
 def WebIDLTest(parser, harness):
     parser.parse("""
-      [PrimaryGlobal] interface Foo {};
-      [Global=(Bar1,Bar2)] interface Bar {};
-      [Global=Baz2] interface Baz {};
+      [Global, Exposed=Foo] interface Foo {};
+      [Global=(Bar, Bar1,Bar2), Exposed=Bar] interface Bar {};
+      [Global=(Baz, Baz2), Exposed=Baz] interface Baz {};
 
       [Exposed=(Foo,Bar1)]
       interface Iface {
@@ -51,10 +51,11 @@ def WebIDLTest(parser, harness):
 
     parser = parser.reset()
     parser.parse("""
-      [PrimaryGlobal] interface Foo {};
-      [Global=(Bar1,Bar2)] interface Bar {};
-      [Global=Baz2] interface Baz {};
+      [Global, Exposed=Foo] interface Foo {};
+      [Global=(Bar, Bar1, Bar2), Exposed=Bar] interface Bar {};
+      [Global=(Baz, Baz2), Exposed=Baz] interface Baz {};
 
+      [Exposed=Foo]
       interface Iface2 {
         void method3();
       };
@@ -80,9 +81,9 @@ def WebIDLTest(parser, harness):
 
     parser = parser.reset()
     parser.parse("""
-      [PrimaryGlobal] interface Foo {};
-      [Global=(Bar1,Bar2)] interface Bar {};
-      [Global=Baz2] interface Baz {};
+      [Global, Exposed=Foo] interface Foo {};
+      [Global=(Bar, Bar1, Bar2), Exposed=Bar] interface Bar {};
+      [Global=(Baz, Baz2), Exposed=Baz] interface Baz {};
 
       [Exposed=Foo]
       interface Iface3 {
@@ -90,11 +91,11 @@ def WebIDLTest(parser, harness):
       };
 
       [Exposed=(Foo,Bar1)]
-      interface Mixin {
+      interface mixin Mixin {
         void method5();
       };
 
-      Iface3 implements Mixin;
+      Iface3 includes Mixin;
     """)
     results = parser.finish()
     harness.check(len(results), 6, "Should know about six things");
@@ -181,8 +182,8 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global] interface Foo {};
-            [Global] interface Bar {};
+            [Global, Exposed=Foo] interface Foo {};
+            [Global, Exposed=Bar] interface Bar {};
 
             [Exposed=Foo]
             interface Baz {
@@ -198,25 +199,40 @@ def WebIDLTest(parser, harness):
     harness.ok(threw, "Should have thrown on member exposed where its interface is not.")
 
     parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            [Global] interface Foo {};
-            [Global] interface Bar {};
+    parser.parse("""
+        [Global, Exposed=Foo] interface Foo {};
+        [Global, Exposed=Bar] interface Bar {};
 
-            [Exposed=Foo]
-            interface Baz {
-              void method();
-            };
+        [Exposed=Foo]
+        interface Baz {
+          void method();
+        };
 
-            [Exposed=Bar]
-            interface Mixin {};
+        [Exposed=Bar]
+        interface mixin Mixin {
+          void otherMethod();
+        };
 
-            Baz implements Mixin;
-        """)
+        Baz includes Mixin;
+    """)
+
+    results = parser.finish()
+
+    harness.check(len(results), 5, "Should know about five things");
+    iface = results[2]
+    harness.ok(isinstance(iface, WebIDL.IDLInterface),
+               "Should have an interface here");
+    members = iface.members
+    harness.check(len(members), 2, "Should have two members")
+
+    harness.ok(members[0].exposureSet == set(["Foo"]),
+               "method should have the right exposure set")
+    harness.ok(members[0]._exposureGlobalNames == set(["Foo"]),
+               "method should have the right exposure global names")
+
+    harness.ok(members[1].exposureSet == set(["Bar"]),
+               "otherMethod should have the right exposure set")
+    harness.ok(members[1]._exposureGlobalNames == set(["Bar"]),
+               "otherMethod should have the right exposure global names")
 
-        results = parser.finish()
-    except Exception as x:
-        threw = True
 
-    harness.ok(threw, "Should have thrown on LHS of implements being exposed where RHS is not.")
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_global_extended_attr.py b/components/script/dom/bindings/codegen/parser/tests/test_global_extended_attr.py
index bc20da40bbe2..28b79642d86b 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_global_extended_attr.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_global_extended_attr.py
@@ -1,9 +1,10 @@
 def WebIDLTest(parser, harness):
     parser.parse("""
-      [Global]
+      [Global, Exposed=Foo]
       interface Foo : Bar {
         getter any(DOMString name);
       };
+      [Exposed=Foo]
       interface Bar {};
     """)
 
@@ -18,7 +19,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-          [Global]
+          [Global, Exposed=Foo]
           interface Foo {
             getter any(DOMString name);
             setter void(DOMString name, any arg);
@@ -36,7 +37,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-          [Global]
+          [Global, Exposed=Foo]
           interface Foo {
             getter any(DOMString name);
             deleter void(DOMString name);
@@ -54,7 +55,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-          [Global, OverrideBuiltins]
+          [Global, OverrideBuiltins, Exposed=Foo]
           interface Foo {
           };
         """)
@@ -70,10 +71,10 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-          [Global]
+          [Global, Exposed=Foo]
           interface Foo : Bar {
           };
-          [OverrideBuiltins]
+          [OverrideBuiltins, Exposed=Foo]
           interface Bar {
           };
         """)
@@ -89,9 +90,10 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-          [Global]
+          [Global, Exposed=Foo]
           interface Foo {
           };
+          [Exposed=Foo]
           interface Bar : Foo {
           };
         """)
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_implements.py b/components/script/dom/bindings/codegen/parser/tests/test_implements.py
deleted file mode 100644
index 04c47d92abeb..000000000000
--- a/components/script/dom/bindings/codegen/parser/tests/test_implements.py
+++ /dev/null
@@ -1,216 +0,0 @@
-# Import the WebIDL module, so we can do isinstance checks and whatnot
-import WebIDL
-
-def WebIDLTest(parser, harness):
-    # Basic functionality
-    threw = False
-    try:
-        parser.parse("""
-            A implements B;
-            interface B {
-              attribute long x;
-            };
-            interface A {
-              attribute long y;
-            };
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(not threw, "Should not have thrown on implements statement "
-               "before interfaces")
-    harness.check(len(results), 3, "We have three statements")
-    harness.ok(isinstance(results[1], WebIDL.IDLInterface), "B is an interface")
-    harness.check(len(results[1].members), 1, "B has one member")
-    A = results[2]
-    harness.ok(isinstance(A, WebIDL.IDLInterface), "A is an interface")
-    harness.check(len(A.members), 2, "A has two members")
-    harness.check(A.members[0].identifier.name, "y", "First member is 'y'")
-    harness.check(A.members[1].identifier.name, "x", "Second member is 'x'")
-
-    # Duplicated member names not allowed
-    threw = False
-    try:
-        parser.parse("""
-            C implements D;
-            interface D {
-              attribute long x;
-            };
-            interface C {
-              attribute long x;
-            };
-        """)
-        parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should have thrown on implemented interface duplicating "
-               "a name on base interface")
-
-    # Same, but duplicated across implemented interfaces
-    threw = False
-    try:
-        parser.parse("""
-            E implements F;
-            E implements G;
-            interface F {
-              attribute long x;
-            };
-            interface G {
-              attribute long x;
-            };
-            interface E {};
-        """)
-        parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should have thrown on implemented interfaces "
-               "duplicating each other's member names")
-
-    # Same, but duplicated across indirectly implemented interfaces
-    threw = False
-    try:
-        parser.parse("""
-            H implements I;
-            H implements J;
-            I implements K;
-            interface K {
-              attribute long x;
-            };
-            interface L {
-              attribute long x;
-            };
-            interface I {};
-            interface J : L {};
-            interface H {};
-        """)
-        parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should have thrown on indirectly implemented interfaces "
-               "duplicating each other's member names")
-
-    # Same, but duplicated across an implemented interface and its parent
-    threw = False
-    try:
-        parser.parse("""
-            M implements N;
-            interface O {
-              attribute long x;
-            };
-            interface N : O {
-              attribute long x;
-            };
-            interface M {};
-        """)
-        parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should have thrown on implemented interface and its "
-               "ancestor duplicating member names")
-
-    # Reset the parser so we can actually find things where we expect
-    # them in the list
-    parser = parser.reset()
-
-    # Diamonds should be allowed
-    threw = False
-    try:
-        parser.parse("""
-            P implements Q;
-            P implements R;
-            Q implements S;
-            R implements S;
-            interface Q {};
-            interface R {};
-            interface S {
-              attribute long x;
-            };
-            interface P {};
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(not threw, "Diamond inheritance is fine")
-    harness.check(results[6].identifier.name, "S", "We should be looking at 'S'")
-    harness.check(len(results[6].members), 1, "S should have one member")
-    harness.check(results[6].members[0].identifier.name, "x",
-                  "S's member should be 'x'")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface TestInterface {
-            };
-            callback interface TestCallbackInterface {
-            };
-            TestInterface implements TestCallbackInterface;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw,
-               "Should not allow callback interfaces on the right-hand side "
-               "of 'implements'")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface TestInterface {
-            };
-            callback interface TestCallbackInterface {
-            };
-            TestCallbackInterface implements TestInterface;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw,
-               "Should not allow callback interfaces on the left-hand side of "
-               "'implements'")
-    
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface TestInterface {
-            };
-            dictionary Dict {
-            };
-            Dict implements TestInterface;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw,
-               "Should not allow non-interfaces on the left-hand side "
-               "of 'implements'")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface TestInterface {
-            };
-            dictionary Dict {
-            };
-            TestInterface implements Dict;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw,
-               "Should not allow non-interfaces on the right-hand side "
-               "of 'implements'")
-
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_interface.py b/components/script/dom/bindings/codegen/parser/tests/test_interface.py
index 28e6af94597c..47db3ae4cc9f 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_interface.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_interface.py
@@ -80,100 +80,6 @@ def WebIDLTest(parser, harness):
 
     harness.ok(threw, "Should not allow indirect cycles in interface inheritance chains")
 
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A {};
-            interface B {};
-            A implements B;
-            B implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow cycles via implements")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A {};
-            interface C {};
-            interface B {};
-            A implements C;
-            C implements B;
-            B implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow indirect cycles via implements")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A : B {};
-            interface B {};
-            B implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow inheriting from an interface that implements us")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A : B {};
-            interface B {};
-            interface C {};
-            B implements C;
-            C implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow inheriting from an interface that indirectly implements us")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A : B {};
-            interface B : C {};
-            interface C {};
-            C implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow indirectly inheriting from an interface that implements us")
-
-    parser = parser.reset()
-    threw = False
-    try:
-        parser.parse("""
-            interface A : B {};
-            interface B : C {};
-            interface C {};
-            interface D {};
-            C implements D;
-            D implements A;
-        """)
-        results = parser.finish()
-    except:
-        threw = True
-
-    harness.ok(threw, "Should not allow indirectly inheriting from an interface that indirectly implements us")
-
     parser = parser.reset()
     threw = False
     try:
@@ -377,7 +283,7 @@ def WebIDLTest(parser, harness):
 
     parser = parser.reset()
     parser.parse("""
-        [Global] interface Window {};
+        [Global, Exposed=Window] interface Window {};
         [Exposed=Window, LegacyWindowAlias=A]
         interface B {};
         [Exposed=Window, LegacyWindowAlias=(C, D)]
@@ -419,7 +325,8 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global] interface Window {};
+            [Global, Exposed=Window] interface Window {};
+            [Exposed=Window]
             interface A {};
             [Exposed=Window, LegacyWindowAlias=A]
             interface B {};
@@ -434,9 +341,10 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global] interface Window {};
+            [Global, Exposed=Window] interface Window {};
             [Exposed=Window, LegacyWindowAlias=A]
             interface B {};
+            [Exposed=Window]
             interface A {};
         """)
         results = parser.finish()
@@ -449,7 +357,7 @@ def WebIDLTest(parser, harness):
     threw = False
     try:
         parser.parse("""
-            [Global] interface Window {};
+            [Global, Exposed=Window] interface Window {};
             [Exposed=Window, LegacyWindowAlias=A]
             interface B {};
             [Exposed=Window, LegacyWindowAlias=A]
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_interface_maplikesetlikeiterable.py b/components/script/dom/bindings/codegen/parser/tests/test_interface_maplikesetlikeiterable.py
index 5de2e02af7e2..e070adee7e62 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_interface_maplikesetlikeiterable.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_interface_maplikesetlikeiterable.py
@@ -252,16 +252,6 @@ def shouldFail(prefix, iface):
                };
                """, mapRWMembers, numProductions=2)
 
-    shouldPass("Implements with maplike/setlike",
-               """
-               interface Foo1 {
-               maplike<long, long>;
-               };
-               interface Foo2 {
-               };
-               Foo2 implements Foo1;
-               """, mapRWMembers, numProductions=3)
-
     shouldPass("JS Implemented maplike interface",
                """
                [JSImplementation="@mozilla.org/dom/test-interface-js-maplike;1"]
@@ -350,31 +340,6 @@ def shouldFail(prefix, iface):
                };
                """)
 
-    shouldFail("Consequential interface with conflicting maplike/setlike",
-               """
-               interface Foo1 {
-               maplike<long, long>;
-               };
-               interface Foo2 {
-               setlike<long>;
-               };
-               Foo2 implements Foo1;
-               """)
-
-    shouldFail("Consequential interfaces with conflicting maplike/setlike",
-               """
-               interface Foo1 {
-               maplike<long, long>;
-               };
-               interface Foo2 {
-               setlike<long>;
-               };
-               interface Foo3 {
-               };
-               Foo3 implements Foo1;
-               Foo3 implements Foo2;
-               """)
-
     #
     # Member name collision tests
     #
@@ -477,52 +442,28 @@ def testConflictingMembers(likeMember, conflictName, expectedMembers, methodPass
                };
                """, mapRWMembers, numProductions=3)
 
-    shouldFail("Interface with consequential maplike/setlike interface member collision",
-               """
-               interface Foo1 {
-               void entries();
-               };
-               interface Foo2 {
-               maplike<long, long>;
-               };
-               Foo1 implements Foo2;
-               """)
-
-    shouldFail("Maplike interface with consequential interface member collision",
+    shouldFail("Maplike interface with mixin member collision",
                """
                interface Foo1 {
                maplike<long, long>;
                };
-               interface Foo2 {
+               interface mixin Foo2 {
                void entries();
                };
-               Foo1 implements Foo2;
+               Foo1 includes Foo2;
                """)
 
-    shouldPass("Consequential Maplike interface with inherited interface member collision",
-               """
-               interface Foo1 {
-               maplike<long, long>;
-               };
-               interface Foo2 {
-               void entries();
-               };
-               interface Foo3 : Foo2 {
-               };
-               Foo3 implements Foo1;
-               """, mapRWMembers, numProductions=4)
-
     shouldPass("Inherited Maplike interface with consequential interface member collision",
                """
                interface Foo1 {
                maplike<long, long>;
                };
-               interface Foo2 {
+               interface mixin Foo2 {
                void entries();
                };
                interface Foo3 : Foo1 {
                };
-               Foo3 implements Foo2;
+               Foo3 includes Foo2;
                """, mapRWMembers, numProductions=4)
 
     shouldFail("Inheritance of name collision with child maplike/setlike",
@@ -645,7 +586,7 @@ def testConflictingMembers(likeMember, conflictName, expectedMembers, methodPass
                };
                """)
 
-    shouldPass("Implemented interface with readonly allowable overrides",
+    shouldPass("Interface with readonly allowable overrides",
                """
                interface Foo1 {
                readonly setlike<long>;
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_interfacemixin.py b/components/script/dom/bindings/codegen/parser/tests/test_interfacemixin.py
index ae3400d2cdb2..477a9f377998 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_interfacemixin.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_interfacemixin.py
@@ -337,10 +337,48 @@ def WebIDLTest(parser, harness):
     harness.ok(threw,
                "Should fail if an interface mixin includes maplike")
 
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface Interface {
+                attribute short attr;
+            };
+            interface mixin Mixin {
+                attribute short attr;
+            };
+            Interface includes Mixin;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should fail if the included mixin interface has duplicated member")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface Interface {};
+            interface mixin Mixin1 {
+                attribute short attr;
+            };
+            interface mixin Mixin2 {
+                attribute short attr;
+            };
+            Interface includes Mixin1;
+            Interface includes Mixin2;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+    harness.ok(threw,
+               "Should fail if the included mixin interfaces have duplicated member")
+
     parser = parser.reset()
     parser.parse("""
-        [Global] interface Window {};
-        [Global] interface Worker {};
+        [Global, Exposed=Window] interface Window {};
+        [Global, Exposed=Worker] interface Worker {};
         [Exposed=Window]
         interface Base {};
         interface mixin Mixin {
@@ -356,8 +394,8 @@ def WebIDLTest(parser, harness):
 
     parser = parser.reset()
     parser.parse("""
-        [Global] interface Window {};
-        [Global] interface Worker {};
+        [Global, Exposed=Window] interface Window {};
+        [Global, Exposed=Worker] interface Worker {};
         [Exposed=Window]
         interface Base {};
         [Exposed=Window]
@@ -371,3 +409,29 @@ def WebIDLTest(parser, harness):
     attr = base.members[0]
     harness.check(attr.exposureSet, set(["Window"]),
                  "Should follow [Exposed] on interface mixin")
+
+    parser = parser.reset()
+    parser.parse("""
+        [Global, Exposed=Window] interface Window {};
+        [Global, Exposed=Worker] interface Worker {};
+        [Exposed=Window]
+        interface Base1 {};
+        [Exposed=Worker]
+        interface Base2 {};
+        interface mixin Mixin {
+            attribute short a;
+        };
+        Base1 includes Mixin;
+        Base2 includes Mixin;
+    """)
+    results = parser.finish()
+    base = results[2]
+    attr = base.members[0]
+    harness.check(attr.exposureSet, set(["Window", "Worker"]),
+                 "Should expose on all globals where including interfaces are "
+                  "exposed")
+    base = results[3]
+    attr = base.members[0]
+    harness.check(attr.exposureSet, set(["Window", "Worker"]),
+                 "Should expose on all globals where including interfaces are "
+                  "exposed")
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_securecontext_extended_attribute.py b/components/script/dom/bindings/codegen/parser/tests/test_securecontext_extended_attribute.py
index 084f19fa7f5e..442dba45d760 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_securecontext_extended_attribute.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_securecontext_extended_attribute.py
@@ -288,33 +288,32 @@ def WebIDLTest(parser, harness):
         threw = True
     harness.ok(threw, "[SecureContext] must appear on interfaces that inherit from another [SecureContext] interface")
 
-    # Test 'implements'. The behavior tested here may have to change depending
-    # on the resolution of https://github.com/heycam/webidl/issues/118
+    # Test 'includes'.
     parser = parser.reset()
     parser.parse("""
         [SecureContext]
-        interface TestSecureContextInterfaceThatImplementsNonSecureContextInterface {
+        interface TestSecureContextInterfaceThatIncludesNonSecureContextMixin {
           const octet TEST_CONSTANT = 0;
         };
-        interface TestNonSecureContextInterface {
+        interface mixin TestNonSecureContextMixin {
           const octet TEST_CONSTANT_2 = 0;
           readonly attribute byte testAttribute2;
           void testMethod2(byte foo);
         };
-        TestSecureContextInterfaceThatImplementsNonSecureContextInterface implements TestNonSecureContextInterface;
+        TestSecureContextInterfaceThatIncludesNonSecureContextMixin includes TestNonSecureContextMixin;
      """)
     results = parser.finish()
-    harness.check(len(results[0].members), 4, "TestSecureContextInterfaceThatImplementsNonSecureContextInterface should have two members")
+    harness.check(len(results[0].members), 4, "TestSecureContextInterfaceThatImplementsNonSecureContextInterface should have four members")
     harness.ok(results[0].getExtendedAttribute("SecureContext"),
                "Interface should have [SecureContext] extended attribute")
     harness.ok(results[0].members[0].getExtendedAttribute("SecureContext"),
                "[SecureContext] should propagate from interface to constant members even when other members are copied from a non-[SecureContext] interface")
     harness.ok(results[0].members[1].getExtendedAttribute("SecureContext") is None,
-               "Constants copied from non-[SecureContext] interface should not be [SecureContext]")
+               "Constants copied from non-[SecureContext] mixin should not be [SecureContext]")
     harness.ok(results[0].members[2].getExtendedAttribute("SecureContext") is None,
-               "Attributes copied from non-[SecureContext] interface should not be [SecureContext]")
+               "Attributes copied from non-[SecureContext] mixin should not be [SecureContext]")
     harness.ok(results[0].members[3].getExtendedAttribute("SecureContext") is None,
-               "Methods copied from non-[SecureContext] interface should not be [SecureContext]")
+               "Methods copied from non-[SecureContext] mixin should not be [SecureContext]")
  
     # Test SecureContext and NoInterfaceObject
     parser = parser.reset()
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_unforgeable.py b/components/script/dom/bindings/codegen/parser/tests/test_unforgeable.py
index 44a168670ed3..770a9d3736f7 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_unforgeable.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_unforgeable.py
@@ -141,16 +141,16 @@ def WebIDLTest(parser, harness):
             interface Child : Parent {
             };
             interface Parent {};
-            interface Consequential {
+            interface mixin Mixin {
               [Unforgeable] readonly attribute long foo;
             };
-            Parent implements Consequential;
+            Parent includes Mixin;
         """)
 
     results = parser.finish()
     harness.check(len(results), 4,
                   "Should be able to inherit from an interface with a "
-                  "consequential interface with [Unforgeable] properties.")
+                  "mixin with [Unforgeable] properties.")
 
     parser = parser.reset();
     threw = False
@@ -160,10 +160,10 @@ def WebIDLTest(parser, harness):
               void foo();
             };
             interface Parent {};
-            interface Consequential {
+            interface mixin Mixin {
               [Unforgeable] readonly attribute long foo;
             };
-            Parent implements Consequential;
+            Parent includes Mixin;
         """)
 
         results = parser.finish()
@@ -182,14 +182,14 @@ def WebIDLTest(parser, harness):
             };
             interface Parent : GrandParent {};
             interface GrandParent {};
-            interface Consequential {
+            interface mixin Mixin {
               [Unforgeable] readonly attribute long foo;
             };
-            GrandParent implements Consequential;
-            interface ChildConsequential {
+            GrandParent includes Mixin;
+            interface mixin ChildMixin {
               void foo();
             };
-            Child implements ChildConsequential;
+            Child includes ChildMixin;
         """)
 
         results = parser.finish()
@@ -208,14 +208,14 @@ def WebIDLTest(parser, harness):
             };
             interface Parent : GrandParent {};
             interface GrandParent {};
-            interface Consequential {
+            interface mixin Mixin {
               [Unforgeable] void foo();
             };
-            GrandParent implements Consequential;
-            interface ChildConsequential {
+            GrandParent includes Mixin;
+            interface mixin ChildMixin {
               void foo();
             };
-            Child implements ChildConsequential;
+            Child includes ChildMixin;
         """)
 
         results = parser.finish()
diff --git a/components/script/dom/bindings/codegen/parser/update.sh b/components/script/dom/bindings/codegen/parser/update.sh
index 81b3d944a704..fee9720ab2da 100755
--- a/components/script/dom/bindings/codegen/parser/update.sh
+++ b/components/script/dom/bindings/codegen/parser/update.sh
@@ -1,11 +1,11 @@
-wget https://hg.mozilla.org/mozilla-central/raw-file/e447e3d69684cf04a95a35b9708174a6538eb042/dom/bindings/parser/WebIDL.py -O WebIDL.py
+wget https://hg.mozilla.org/mozilla-central/raw-file/tip/dom/bindings/parser/WebIDL.py -O WebIDL.py
 patch < abstract.patch
 patch < debug.patch
 patch < callback-location.patch
 patch < union-typedef.patch
 patch < inline.patch
 
-wget https://hg.mozilla.org/mozilla-central/archive/e447e3d69684cf04a95a35b9708174a6538eb042.tar.gz/dom/bindings/parser/tests/ -O tests.tar.gz
+wget https://hg.mozilla.org/mozilla-central/archive/tip.tar.gz/dom/bindings/parser/tests/ -O tests.tar.gz
 rm -r tests
 mkdir tests
 tar xvpf tests.tar.gz  -C tests --strip-components=5
diff --git a/components/script/dom/webidls/ANGLEInstancedArrays.webidl b/components/script/dom/webidls/ANGLEInstancedArrays.webidl
index b629117460b3..fc7e5d3efab7 100644
--- a/components/script/dom/webidls/ANGLEInstancedArrays.webidl
+++ b/components/script/dom/webidls/ANGLEInstancedArrays.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/ANGLE_instanced_arrays/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface ANGLEInstancedArrays {
     const GLenum VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE = 0x88FE;
     void drawArraysInstancedANGLE(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
diff --git a/components/script/dom/webidls/Attr.webidl b/components/script/dom/webidls/Attr.webidl
index 5cfd5ac9d2fb..9bd212e9fe5f 100644
--- a/components/script/dom/webidls/Attr.webidl
+++ b/components/script/dom/webidls/Attr.webidl
@@ -7,6 +7,7 @@
  *
  */
 
+[Exposed=Window]
 interface Attr {
   [Constant]
   readonly attribute DOMString? namespaceURI;
diff --git a/components/script/dom/webidls/Bluetooth.webidl b/components/script/dom/webidls/Bluetooth.webidl
index 8a8d8e6cc436..a24206036bfc 100644
--- a/components/script/dom/webidls/Bluetooth.webidl
+++ b/components/script/dom/webidls/Bluetooth.webidl
@@ -25,7 +25,7 @@ dictionary RequestDeviceOptions {
   boolean acceptAllDevices = false;
 };
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface Bluetooth : EventTarget {
   [SecureContext]
   Promise<boolean> getAvailability();
diff --git a/components/script/dom/webidls/BluetoothAdvertisingEvent.webidl b/components/script/dom/webidls/BluetoothAdvertisingEvent.webidl
index b27590266de8..a7dd3fe947fd 100644
--- a/components/script/dom/webidls/BluetoothAdvertisingEvent.webidl
+++ b/components/script/dom/webidls/BluetoothAdvertisingEvent.webidl
@@ -10,7 +10,7 @@
 interface BluetoothServiceDataMap {
   readonly maplike<UUID, DataView>;
 };*/
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothAdvertisingEvent : Event {
   [Throws] constructor(DOMString type, BluetoothAdvertisingEventInit init);
   [SameObject]
diff --git a/components/script/dom/webidls/BluetoothCharacteristicProperties.webidl b/components/script/dom/webidls/BluetoothCharacteristicProperties.webidl
index d704fcca8551..124f881a2e01 100644
--- a/components/script/dom/webidls/BluetoothCharacteristicProperties.webidl
+++ b/components/script/dom/webidls/BluetoothCharacteristicProperties.webidl
@@ -4,7 +4,7 @@
 
 // https://webbluetoothcg.github.io/web-bluetooth/#characteristicproperties
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothCharacteristicProperties {
   readonly attribute boolean broadcast;
   readonly attribute boolean read;
diff --git a/components/script/dom/webidls/BluetoothDevice.webidl b/components/script/dom/webidls/BluetoothDevice.webidl
index bfbd13913e68..8ead21681465 100644
--- a/components/script/dom/webidls/BluetoothDevice.webidl
+++ b/components/script/dom/webidls/BluetoothDevice.webidl
@@ -4,7 +4,7 @@
 
 // https://webbluetoothcg.github.io/web-bluetooth/#bluetoothdevice
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothDevice : EventTarget {
   readonly attribute DOMString id;
   readonly attribute DOMString? name;
diff --git a/components/script/dom/webidls/BluetoothPermissionResult.webidl b/components/script/dom/webidls/BluetoothPermissionResult.webidl
index 0f77c320f980..4f9f2871a2e6 100644
--- a/components/script/dom/webidls/BluetoothPermissionResult.webidl
+++ b/components/script/dom/webidls/BluetoothPermissionResult.webidl
@@ -12,7 +12,7 @@ dictionary BluetoothPermissionDescriptor : PermissionDescriptor {
   boolean acceptAllDevices = false;
 };
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothPermissionResult : PermissionStatus {
   // attribute FrozenArray<BluetoothDevice> devices;
   // Workaround until FrozenArray get implemented.
diff --git a/components/script/dom/webidls/BluetoothRemoteGATTCharacteristic.webidl b/components/script/dom/webidls/BluetoothRemoteGATTCharacteristic.webidl
index c81bfa4b4038..af85d1c1860d 100644
--- a/components/script/dom/webidls/BluetoothRemoteGATTCharacteristic.webidl
+++ b/components/script/dom/webidls/BluetoothRemoteGATTCharacteristic.webidl
@@ -4,7 +4,7 @@
 
 // https://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattcharacteristic
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothRemoteGATTCharacteristic : EventTarget {
   [SameObject]
   readonly attribute BluetoothRemoteGATTService service;
diff --git a/components/script/dom/webidls/BluetoothRemoteGATTDescriptor.webidl b/components/script/dom/webidls/BluetoothRemoteGATTDescriptor.webidl
index c748cf7cfc10..37c8722e2245 100644
--- a/components/script/dom/webidls/BluetoothRemoteGATTDescriptor.webidl
+++ b/components/script/dom/webidls/BluetoothRemoteGATTDescriptor.webidl
@@ -4,7 +4,7 @@
 
 // http://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattdescriptor
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothRemoteGATTDescriptor {
   [SameObject]
   readonly attribute BluetoothRemoteGATTCharacteristic characteristic;
diff --git a/components/script/dom/webidls/BluetoothRemoteGATTServer.webidl b/components/script/dom/webidls/BluetoothRemoteGATTServer.webidl
index a594f9e28784..324750dc39b6 100644
--- a/components/script/dom/webidls/BluetoothRemoteGATTServer.webidl
+++ b/components/script/dom/webidls/BluetoothRemoteGATTServer.webidl
@@ -4,7 +4,7 @@
 
 //https://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattserver
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothRemoteGATTServer {
   [SameObject]
   readonly attribute BluetoothDevice device;
diff --git a/components/script/dom/webidls/BluetoothRemoteGATTService.webidl b/components/script/dom/webidls/BluetoothRemoteGATTService.webidl
index 478f6df22ab0..7e9f624dd1c0 100644
--- a/components/script/dom/webidls/BluetoothRemoteGATTService.webidl
+++ b/components/script/dom/webidls/BluetoothRemoteGATTService.webidl
@@ -4,7 +4,7 @@
 
 // https://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattservice
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothRemoteGATTService : EventTarget {
   [SameObject]
   readonly attribute BluetoothDevice device;
diff --git a/components/script/dom/webidls/BluetoothUUID.webidl b/components/script/dom/webidls/BluetoothUUID.webidl
index 27932b70f7e7..dde82d3acb73 100644
--- a/components/script/dom/webidls/BluetoothUUID.webidl
+++ b/components/script/dom/webidls/BluetoothUUID.webidl
@@ -4,7 +4,7 @@
 
 // https://webbluetoothcg.github.io/web-bluetooth/#bluetoothuuid
 
-[Pref="dom.bluetooth.enabled"]
+[Exposed=Window, Pref="dom.bluetooth.enabled"]
 interface BluetoothUUID {
   [Throws]
   static UUID getService(BluetoothServiceUUID name);
diff --git a/components/script/dom/webidls/CDATASection.webidl b/components/script/dom/webidls/CDATASection.webidl
index cddd6edef6f0..28cb4a850033 100644
--- a/components/script/dom/webidls/CDATASection.webidl
+++ b/components/script/dom/webidls/CDATASection.webidl
@@ -6,5 +6,6 @@
  * https://dom.spec.whatwg.org/#interface-cdatasection
  */
 
+[Exposed=Window]
 interface CDATASection : Text {
 };
diff --git a/components/script/dom/webidls/CharacterData.webidl b/components/script/dom/webidls/CharacterData.webidl
index 64c891d87f82..e69f862afc97 100644
--- a/components/script/dom/webidls/CharacterData.webidl
+++ b/components/script/dom/webidls/CharacterData.webidl
@@ -9,7 +9,7 @@
  * liability, trademark and document use rules apply.
  */
 
-[Abstract]
+[Exposed=Window, Abstract]
 interface CharacterData : Node {
   [Pure] attribute [TreatNullAs=EmptyString] DOMString data;
   [Pure] readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/Comment.webidl b/components/script/dom/webidls/Comment.webidl
index 59b9f78cdf48..0ccda9ee991d 100644
--- a/components/script/dom/webidls/Comment.webidl
+++ b/components/script/dom/webidls/Comment.webidl
@@ -9,6 +9,7 @@
  * liability, trademark and document use rules apply.
  */
 
+[Exposed=Window]
 interface Comment : CharacterData {
   [Throws] constructor(optional DOMString data = "");
 };
diff --git a/components/script/dom/webidls/CompositionEvent.webidl b/components/script/dom/webidls/CompositionEvent.webidl
index a16981e023f8..91bf7f45b3f3 100644
--- a/components/script/dom/webidls/CompositionEvent.webidl
+++ b/components/script/dom/webidls/CompositionEvent.webidl
@@ -8,7 +8,7 @@
  */
 
 // https://w3c.github.io/uievents/#idl-compositionevent
-[Pref="dom.compositionevent.enabled"]
+[Exposed=Window, Pref="dom.compositionevent.enabled"]
 interface CompositionEvent : UIEvent {
   [Throws] constructor(DOMString type, optional CompositionEventInit eventInitDict = {});
   readonly attribute DOMString data;
diff --git a/components/script/dom/webidls/CustomElementRegistry.webidl b/components/script/dom/webidls/CustomElementRegistry.webidl
index d2ebff0bdf08..6d3a7b436de6 100644
--- a/components/script/dom/webidls/CustomElementRegistry.webidl
+++ b/components/script/dom/webidls/CustomElementRegistry.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#customelementregistry
-[Pref="dom.customelements.enabled"]
+[Exposed=Window, Pref="dom.customelements.enabled"]
 interface CustomElementRegistry {
   [Throws, CEReactions]
   void define(DOMString name, CustomElementConstructor constructor_, optional ElementDefinitionOptions options = {});
diff --git a/components/script/dom/webidls/DOMImplementation.webidl b/components/script/dom/webidls/DOMImplementation.webidl
index 56bdd08107c3..cf809b30f1ac 100644
--- a/components/script/dom/webidls/DOMImplementation.webidl
+++ b/components/script/dom/webidls/DOMImplementation.webidl
@@ -10,6 +10,7 @@
  * related or neighboring rights to this work.
  */
 
+[Exposed=Window]
 interface DOMImplementation {
   [NewObject, Throws]
   DocumentType createDocumentType(DOMString qualifiedName, DOMString publicId,
diff --git a/components/script/dom/webidls/DOMParser.webidl b/components/script/dom/webidls/DOMParser.webidl
index e804adfecd50..8af1f309c785 100644
--- a/components/script/dom/webidls/DOMParser.webidl
+++ b/components/script/dom/webidls/DOMParser.webidl
@@ -14,6 +14,7 @@ enum SupportedType {
   "image/svg+xml"*/
 };
 
+[Exposed=Window]
 interface DOMParser {
   [Throws] constructor();
   [Throws]
diff --git a/components/script/dom/webidls/DOMStringMap.webidl b/components/script/dom/webidls/DOMStringMap.webidl
index 50799f0543de..0acf6f702282 100644
--- a/components/script/dom/webidls/DOMStringMap.webidl
+++ b/components/script/dom/webidls/DOMStringMap.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#the-domstringmap-interface
-[OverrideBuiltins]
+[Exposed=Window, OverrideBuiltins]
 interface DOMStringMap {
   getter DOMString (DOMString name);
   [CEReactions, Throws]
diff --git a/components/script/dom/webidls/DOMTokenList.webidl b/components/script/dom/webidls/DOMTokenList.webidl
index 636d38c61089..c4b1ff776bc9 100644
--- a/components/script/dom/webidls/DOMTokenList.webidl
+++ b/components/script/dom/webidls/DOMTokenList.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://dom.spec.whatwg.org/#domtokenlist
+[Exposed=Window]
 interface DOMTokenList {
   [Pure]
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/Document.webidl b/components/script/dom/webidls/Document.webidl
index 04109960ce9e..9476b9c2d6df 100644
--- a/components/script/dom/webidls/Document.webidl
+++ b/components/script/dom/webidls/Document.webidl
@@ -8,6 +8,7 @@
  */
 
 // https://dom.spec.whatwg.org/#interface-document
+[Exposed=Window]
 interface Document : Node {
   [Throws] constructor();
   [SameObject]
diff --git a/components/script/dom/webidls/DocumentFragment.webidl b/components/script/dom/webidls/DocumentFragment.webidl
index 8c3cadf94554..ec97caecf93f 100644
--- a/components/script/dom/webidls/DocumentFragment.webidl
+++ b/components/script/dom/webidls/DocumentFragment.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://dom.spec.whatwg.org/#interface-documentfragment
+[Exposed=Window]
 interface DocumentFragment : Node {
   [Throws] constructor();
 };
diff --git a/components/script/dom/webidls/DocumentType.webidl b/components/script/dom/webidls/DocumentType.webidl
index 65d643a8dca3..8d00b6df451c 100644
--- a/components/script/dom/webidls/DocumentType.webidl
+++ b/components/script/dom/webidls/DocumentType.webidl
@@ -9,6 +9,7 @@
  * liability, trademark and document use rules apply.
  */
 
+[Exposed=Window]
 interface DocumentType : Node {
   [Constant]
   readonly attribute DOMString name;
diff --git a/components/script/dom/webidls/EXTBlendMinmax.webidl b/components/script/dom/webidls/EXTBlendMinmax.webidl
index be82b29e0ab1..767eace6923f 100644
--- a/components/script/dom/webidls/EXTBlendMinmax.webidl
+++ b/components/script/dom/webidls/EXTBlendMinmax.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/EXT_blend_minmax/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface EXTBlendMinmax {
   const GLenum MIN_EXT = 0x8007;
   const GLenum MAX_EXT = 0x8008;
diff --git a/components/script/dom/webidls/EXTColorBufferHalfFloat.webidl b/components/script/dom/webidls/EXTColorBufferHalfFloat.webidl
index 26a863fcd3d8..77cf23c6cd0e 100644
--- a/components/script/dom/webidls/EXTColorBufferHalfFloat.webidl
+++ b/components/script/dom/webidls/EXTColorBufferHalfFloat.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/EXT_color_buffer_half_float/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface EXTColorBufferHalfFloat {
   const GLenum RGBA16F_EXT = 0x881A;
   const GLenum RGB16F_EXT = 0x881B;
diff --git a/components/script/dom/webidls/EXTShaderTextureLod.webidl b/components/script/dom/webidls/EXTShaderTextureLod.webidl
index 8a33e03d80d7..decb5ba86ac3 100644
--- a/components/script/dom/webidls/EXTShaderTextureLod.webidl
+++ b/components/script/dom/webidls/EXTShaderTextureLod.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/EXT_shader_texture_lod/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface EXTShaderTextureLod {
 };
diff --git a/components/script/dom/webidls/EXTTextureFilterAnisotropic.webidl b/components/script/dom/webidls/EXTTextureFilterAnisotropic.webidl
index 4ba811e1563e..d29575008449 100644
--- a/components/script/dom/webidls/EXTTextureFilterAnisotropic.webidl
+++ b/components/script/dom/webidls/EXTTextureFilterAnisotropic.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/EXT_texture_filter_anisotropic/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface EXTTextureFilterAnisotropic {
   const GLenum TEXTURE_MAX_ANISOTROPY_EXT       = 0x84FE;
   const GLenum MAX_TEXTURE_MAX_ANISOTROPY_EXT   = 0x84FF;
diff --git a/components/script/dom/webidls/Element.webidl b/components/script/dom/webidls/Element.webidl
index c720ff4b88e3..4c44b2cd4316 100644
--- a/components/script/dom/webidls/Element.webidl
+++ b/components/script/dom/webidls/Element.webidl
@@ -12,6 +12,7 @@
  * liability, trademark and document use rules apply.
  */
 
+[Exposed=Window]
 interface Element : Node {
   [Constant]
   readonly attribute DOMString? namespaceURI;
diff --git a/components/script/dom/webidls/EventListener.webidl b/components/script/dom/webidls/EventListener.webidl
index 4e72eccc6096..f384e661c634 100644
--- a/components/script/dom/webidls/EventListener.webidl
+++ b/components/script/dom/webidls/EventListener.webidl
@@ -5,6 +5,7 @@
  * https://dom.spec.whatwg.org/#callbackdef-eventlistener
  */
 
+[Exposed=Window]
 callback interface EventListener {
   void handleEvent(Event event);
 };
diff --git a/components/script/dom/webidls/Gamepad.webidl b/components/script/dom/webidls/Gamepad.webidl
index de2800b4a982..224e6c5511d6 100644
--- a/components/script/dom/webidls/Gamepad.webidl
+++ b/components/script/dom/webidls/Gamepad.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/gamepad/#gamepad-interface
-[Pref="dom.gamepad.enabled"]
+[Exposed=Window, Pref="dom.gamepad.enabled"]
 interface Gamepad {
     readonly attribute DOMString id;
     readonly attribute long index;
diff --git a/components/script/dom/webidls/GamepadButton.webidl b/components/script/dom/webidls/GamepadButton.webidl
index 9837c288db19..748d47232ac3 100644
--- a/components/script/dom/webidls/GamepadButton.webidl
+++ b/components/script/dom/webidls/GamepadButton.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/gamepad/#gamepadbutton-interface
-[Pref="dom.gamepad.enabled"]
+[Exposed=Window, Pref="dom.gamepad.enabled"]
 interface GamepadButton {
     readonly attribute boolean pressed;
     readonly attribute boolean touched;
diff --git a/components/script/dom/webidls/GamepadButtonList.webidl b/components/script/dom/webidls/GamepadButtonList.webidl
index 6dcd729c6e2a..34ea98570715 100644
--- a/components/script/dom/webidls/GamepadButtonList.webidl
+++ b/components/script/dom/webidls/GamepadButtonList.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/gamepad/#dom-gamepad-buttons
-[Pref="dom.gamepad.enabled"]
+[Exposed=Window, Pref="dom.gamepad.enabled"]
 interface GamepadButtonList {
   getter GamepadButton? item(unsigned long index);
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/GamepadEvent.webidl b/components/script/dom/webidls/GamepadEvent.webidl
index 3bd6ea0c0c85..0da800bafe24 100644
--- a/components/script/dom/webidls/GamepadEvent.webidl
+++ b/components/script/dom/webidls/GamepadEvent.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/gamepad/#gamepadevent-interface
-[Pref="dom.gamepad.enabled"]
+[Exposed=Window, Pref="dom.gamepad.enabled"]
 interface GamepadEvent : Event {
   [Throws] constructor(DOMString type, GamepadEventInit eventInitDict);
   readonly attribute Gamepad gamepad;
diff --git a/components/script/dom/webidls/GamepadList.webidl b/components/script/dom/webidls/GamepadList.webidl
index 568e583698b1..926ab7ac848c 100644
--- a/components/script/dom/webidls/GamepadList.webidl
+++ b/components/script/dom/webidls/GamepadList.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/gamepad/#navigator-interface-extension
-[Pref="dom.gamepad.enabled"]
+[Exposed=Window, Pref="dom.gamepad.enabled"]
 interface GamepadList {
   getter Gamepad? item(unsigned long index);
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/HTMLAnchorElement.webidl b/components/script/dom/webidls/HTMLAnchorElement.webidl
index 875c39ca997e..89d3c8634155 100644
--- a/components/script/dom/webidls/HTMLAnchorElement.webidl
+++ b/components/script/dom/webidls/HTMLAnchorElement.webidl
@@ -11,7 +11,7 @@
  */
 
 // https://html.spec.whatwg.org/multipage/#htmlanchorelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLAnchorElement : HTMLElement {
   [CEReactions]
   attribute DOMString target;
diff --git a/components/script/dom/webidls/HTMLAreaElement.webidl b/components/script/dom/webidls/HTMLAreaElement.webidl
index 0f6b6319fcec..c83457c39940 100644
--- a/components/script/dom/webidls/HTMLAreaElement.webidl
+++ b/components/script/dom/webidls/HTMLAreaElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlareaelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLAreaElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString alt;
diff --git a/components/script/dom/webidls/HTMLAudioElement.webidl b/components/script/dom/webidls/HTMLAudioElement.webidl
index 8b8ff5fa6125..5af7116e44c5 100644
--- a/components/script/dom/webidls/HTMLAudioElement.webidl
+++ b/components/script/dom/webidls/HTMLAudioElement.webidl
@@ -3,5 +3,5 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlaudioelement
-[HTMLConstructor, NamedConstructor=Audio(optional DOMString src)]
+[Exposed=Window, HTMLConstructor, NamedConstructor=Audio(optional DOMString src)]
 interface HTMLAudioElement : HTMLMediaElement {};
diff --git a/components/script/dom/webidls/HTMLBRElement.webidl b/components/script/dom/webidls/HTMLBRElement.webidl
index cf92050e544b..9698acad1f83 100644
--- a/components/script/dom/webidls/HTMLBRElement.webidl
+++ b/components/script/dom/webidls/HTMLBRElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlbrelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLBRElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLBaseElement.webidl b/components/script/dom/webidls/HTMLBaseElement.webidl
index 08e89fa0ead9..a67a54151391 100644
--- a/components/script/dom/webidls/HTMLBaseElement.webidl
+++ b/components/script/dom/webidls/HTMLBaseElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlbaseelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLBaseElement : HTMLElement {
     [CEReactions]
     attribute DOMString href;
diff --git a/components/script/dom/webidls/HTMLBodyElement.webidl b/components/script/dom/webidls/HTMLBodyElement.webidl
index b1aaceccaeb4..280f387187fe 100644
--- a/components/script/dom/webidls/HTMLBodyElement.webidl
+++ b/components/script/dom/webidls/HTMLBodyElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#the-body-element
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLBodyElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLButtonElement.webidl b/components/script/dom/webidls/HTMLButtonElement.webidl
index 196b6301da06..999a253d0d2b 100644
--- a/components/script/dom/webidls/HTMLButtonElement.webidl
+++ b/components/script/dom/webidls/HTMLButtonElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlbuttonelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLButtonElement : HTMLElement {
   // [CEReactions]
   //         attribute boolean autofocus;
diff --git a/components/script/dom/webidls/HTMLCollection.webidl b/components/script/dom/webidls/HTMLCollection.webidl
index 6020c539d5c9..ac0962a5d104 100644
--- a/components/script/dom/webidls/HTMLCollection.webidl
+++ b/components/script/dom/webidls/HTMLCollection.webidl
@@ -4,7 +4,7 @@
 
 // https://dom.spec.whatwg.org/#interface-htmlcollection
 
-[LegacyUnenumerableNamedProperties]
+[Exposed=Window, LegacyUnenumerableNamedProperties]
 interface HTMLCollection {
   [Pure]
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/HTMLDListElement.webidl b/components/script/dom/webidls/HTMLDListElement.webidl
index dabc1cca88f7..a0e859846f59 100644
--- a/components/script/dom/webidls/HTMLDListElement.webidl
+++ b/components/script/dom/webidls/HTMLDListElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldlistelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDListElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLDataElement.webidl b/components/script/dom/webidls/HTMLDataElement.webidl
index 572dc8d6521d..cab3da5a1034 100644
--- a/components/script/dom/webidls/HTMLDataElement.webidl
+++ b/components/script/dom/webidls/HTMLDataElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldataelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDataElement : HTMLElement {
     [CEReactions]
            attribute DOMString value;
diff --git a/components/script/dom/webidls/HTMLDataListElement.webidl b/components/script/dom/webidls/HTMLDataListElement.webidl
index da856f4beb26..f63ecfdcf77f 100644
--- a/components/script/dom/webidls/HTMLDataListElement.webidl
+++ b/components/script/dom/webidls/HTMLDataListElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldatalistelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDataListElement : HTMLElement {
   readonly attribute HTMLCollection options;
 };
diff --git a/components/script/dom/webidls/HTMLDetailsElement.webidl b/components/script/dom/webidls/HTMLDetailsElement.webidl
index 768c3d598aa1..53f1dc3259f0 100644
--- a/components/script/dom/webidls/HTMLDetailsElement.webidl
+++ b/components/script/dom/webidls/HTMLDetailsElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldetailselement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDetailsElement : HTMLElement {
     [CEReactions]
     attribute boolean open;
diff --git a/components/script/dom/webidls/HTMLDialogElement.webidl b/components/script/dom/webidls/HTMLDialogElement.webidl
index 4359c1cddd75..847098850cc1 100644
--- a/components/script/dom/webidls/HTMLDialogElement.webidl
+++ b/components/script/dom/webidls/HTMLDialogElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldialogelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDialogElement : HTMLElement {
   [CEReactions]
   attribute boolean open;
diff --git a/components/script/dom/webidls/HTMLDirectoryElement.webidl b/components/script/dom/webidls/HTMLDirectoryElement.webidl
index 95384c6134ae..e6ec1ebf1092 100644
--- a/components/script/dom/webidls/HTMLDirectoryElement.webidl
+++ b/components/script/dom/webidls/HTMLDirectoryElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldirectoryelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDirectoryElement : HTMLElement {
   // [CEReactions]
   //         attribute boolean compact;
diff --git a/components/script/dom/webidls/HTMLDivElement.webidl b/components/script/dom/webidls/HTMLDivElement.webidl
index 824965e8f340..23c1051373c5 100644
--- a/components/script/dom/webidls/HTMLDivElement.webidl
+++ b/components/script/dom/webidls/HTMLDivElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmldivelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLDivElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLElement.webidl b/components/script/dom/webidls/HTMLElement.webidl
index da1ab7797854..2d2b9fe6c68a 100644
--- a/components/script/dom/webidls/HTMLElement.webidl
+++ b/components/script/dom/webidls/HTMLElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLElement : Element {
   // metadata attributes
   [CEReactions]
diff --git a/components/script/dom/webidls/HTMLEmbedElement.webidl b/components/script/dom/webidls/HTMLEmbedElement.webidl
index 24f2a25d6ce8..94549e3c1c6e 100644
--- a/components/script/dom/webidls/HTMLEmbedElement.webidl
+++ b/components/script/dom/webidls/HTMLEmbedElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlembedelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLEmbedElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString src;
diff --git a/components/script/dom/webidls/HTMLFieldSetElement.webidl b/components/script/dom/webidls/HTMLFieldSetElement.webidl
index 820516c457f1..b7c5e2006c36 100644
--- a/components/script/dom/webidls/HTMLFieldSetElement.webidl
+++ b/components/script/dom/webidls/HTMLFieldSetElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlfieldsetelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLFieldSetElement : HTMLElement {
   [CEReactions]
            attribute boolean disabled;
diff --git a/components/script/dom/webidls/HTMLFontElement.webidl b/components/script/dom/webidls/HTMLFontElement.webidl
index 498542ed8770..c1eb66836007 100644
--- a/components/script/dom/webidls/HTMLFontElement.webidl
+++ b/components/script/dom/webidls/HTMLFontElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlfontelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLFontElement : HTMLElement {
   [CEReactions]
   attribute [TreatNullAs=EmptyString] DOMString color;
diff --git a/components/script/dom/webidls/HTMLFormControlsCollection.webidl b/components/script/dom/webidls/HTMLFormControlsCollection.webidl
index c3fd3669e4cf..c1b222dee23e 100644
--- a/components/script/dom/webidls/HTMLFormControlsCollection.webidl
+++ b/components/script/dom/webidls/HTMLFormControlsCollection.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlformcontrolscollection
+[Exposed=Window]
 interface HTMLFormControlsCollection : HTMLCollection {
   // inherits length and item()
   getter (RadioNodeList or Element)? namedItem(DOMString name); // shadows inherited namedItem()
diff --git a/components/script/dom/webidls/HTMLFormElement.webidl b/components/script/dom/webidls/HTMLFormElement.webidl
index a672088322ed..b944241093ff 100644
--- a/components/script/dom/webidls/HTMLFormElement.webidl
+++ b/components/script/dom/webidls/HTMLFormElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlformelement
-[/*OverrideBuiltins, */HTMLConstructor]
+[Exposed=Window, /*OverrideBuiltins, */HTMLConstructor]
 interface HTMLFormElement : HTMLElement {
   [CEReactions]
            attribute DOMString acceptCharset;
diff --git a/components/script/dom/webidls/HTMLFrameElement.webidl b/components/script/dom/webidls/HTMLFrameElement.webidl
index 6eb8dd5ef2d0..842b3ab1d152 100644
--- a/components/script/dom/webidls/HTMLFrameElement.webidl
+++ b/components/script/dom/webidls/HTMLFrameElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlframeelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLFrameElement : HTMLElement {
   // [CEReactions]
   //          attribute DOMString name;
diff --git a/components/script/dom/webidls/HTMLFrameSetElement.webidl b/components/script/dom/webidls/HTMLFrameSetElement.webidl
index eae4d57a68c8..5aea0929ccc4 100644
--- a/components/script/dom/webidls/HTMLFrameSetElement.webidl
+++ b/components/script/dom/webidls/HTMLFrameSetElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlframesetelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLFrameSetElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString cols;
diff --git a/components/script/dom/webidls/HTMLHRElement.webidl b/components/script/dom/webidls/HTMLHRElement.webidl
index 899d55f50b4e..dd9e945fbbcc 100644
--- a/components/script/dom/webidls/HTMLHRElement.webidl
+++ b/components/script/dom/webidls/HTMLHRElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlhrelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLHRElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLHeadElement.webidl b/components/script/dom/webidls/HTMLHeadElement.webidl
index 273d25e6103f..79843dc536cc 100644
--- a/components/script/dom/webidls/HTMLHeadElement.webidl
+++ b/components/script/dom/webidls/HTMLHeadElement.webidl
@@ -3,5 +3,5 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlheadelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLHeadElement : HTMLElement {};
diff --git a/components/script/dom/webidls/HTMLHeadingElement.webidl b/components/script/dom/webidls/HTMLHeadingElement.webidl
index 0da3656c076a..ad3b44c62182 100644
--- a/components/script/dom/webidls/HTMLHeadingElement.webidl
+++ b/components/script/dom/webidls/HTMLHeadingElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlheadingelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLHeadingElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLHtmlElement.webidl b/components/script/dom/webidls/HTMLHtmlElement.webidl
index abadb08829b5..7ffd53f230d6 100644
--- a/components/script/dom/webidls/HTMLHtmlElement.webidl
+++ b/components/script/dom/webidls/HTMLHtmlElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlhtmlelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLHtmlElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLIFrameElement.webidl b/components/script/dom/webidls/HTMLIFrameElement.webidl
index a92c7e8baa13..00d2218e3389 100644
--- a/components/script/dom/webidls/HTMLIFrameElement.webidl
+++ b/components/script/dom/webidls/HTMLIFrameElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmliframeelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLIFrameElement : HTMLElement {
   [CEReactions]
            attribute USVString src;
diff --git a/components/script/dom/webidls/HTMLImageElement.webidl b/components/script/dom/webidls/HTMLImageElement.webidl
index b3b05d050ca9..79aafaeb0dbf 100644
--- a/components/script/dom/webidls/HTMLImageElement.webidl
+++ b/components/script/dom/webidls/HTMLImageElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlimageelement
-[HTMLConstructor, NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
+[Exposed=Window, HTMLConstructor, NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
 interface HTMLImageElement : HTMLElement {
   [CEReactions]
            attribute DOMString alt;
diff --git a/components/script/dom/webidls/HTMLInputElement.webidl b/components/script/dom/webidls/HTMLInputElement.webidl
index 865c496a96bc..8a71320a9106 100644
--- a/components/script/dom/webidls/HTMLInputElement.webidl
+++ b/components/script/dom/webidls/HTMLInputElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlinputelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLInputElement : HTMLElement {
   [CEReactions]
            attribute DOMString accept;
diff --git a/components/script/dom/webidls/HTMLLIElement.webidl b/components/script/dom/webidls/HTMLLIElement.webidl
index b454cb4a2f7d..fcf034fc1e75 100644
--- a/components/script/dom/webidls/HTMLLIElement.webidl
+++ b/components/script/dom/webidls/HTMLLIElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmllielement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLLIElement : HTMLElement {
   [CEReactions]
   attribute long value;
diff --git a/components/script/dom/webidls/HTMLLabelElement.webidl b/components/script/dom/webidls/HTMLLabelElement.webidl
index 2e16890c511e..f0cb3d219dec 100644
--- a/components/script/dom/webidls/HTMLLabelElement.webidl
+++ b/components/script/dom/webidls/HTMLLabelElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmllabelelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLLabelElement : HTMLElement {
   readonly attribute HTMLFormElement? form;
   [CEReactions]
diff --git a/components/script/dom/webidls/HTMLLegendElement.webidl b/components/script/dom/webidls/HTMLLegendElement.webidl
index c63d4773189e..fc4d136aea90 100644
--- a/components/script/dom/webidls/HTMLLegendElement.webidl
+++ b/components/script/dom/webidls/HTMLLegendElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmllegendelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLLegendElement : HTMLElement {
   readonly attribute HTMLFormElement? form;
 
diff --git a/components/script/dom/webidls/HTMLLinkElement.webidl b/components/script/dom/webidls/HTMLLinkElement.webidl
index 83f9545914bc..dde037463a91 100644
--- a/components/script/dom/webidls/HTMLLinkElement.webidl
+++ b/components/script/dom/webidls/HTMLLinkElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmllinkelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLLinkElement : HTMLElement {
   [CEReactions]
            attribute USVString href;
diff --git a/components/script/dom/webidls/HTMLMapElement.webidl b/components/script/dom/webidls/HTMLMapElement.webidl
index f138f88c7f93..c36163685519 100644
--- a/components/script/dom/webidls/HTMLMapElement.webidl
+++ b/components/script/dom/webidls/HTMLMapElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlmapelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLMapElement : HTMLElement {
   // [CEReactions]
   //          attribute DOMString name;
diff --git a/components/script/dom/webidls/HTMLMediaElement.webidl b/components/script/dom/webidls/HTMLMediaElement.webidl
index cdf32c98312e..fd658913ca5f 100644
--- a/components/script/dom/webidls/HTMLMediaElement.webidl
+++ b/components/script/dom/webidls/HTMLMediaElement.webidl
@@ -7,7 +7,7 @@
 enum CanPlayTypeResult { "" /* empty string */, "maybe", "probably" };
 typedef (MediaStream /*or MediaSource */ or Blob) MediaProvider;
 
-[Abstract]
+[Exposed=Window, Abstract]
 interface HTMLMediaElement : HTMLElement {
   // error state
   readonly attribute MediaError? error;
diff --git a/components/script/dom/webidls/HTMLMetaElement.webidl b/components/script/dom/webidls/HTMLMetaElement.webidl
index 07fed2e9cdfb..eb24222a24d5 100644
--- a/components/script/dom/webidls/HTMLMetaElement.webidl
+++ b/components/script/dom/webidls/HTMLMetaElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlmetaelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLMetaElement : HTMLElement {
   [CEReactions]
              attribute DOMString name;
diff --git a/components/script/dom/webidls/HTMLMeterElement.webidl b/components/script/dom/webidls/HTMLMeterElement.webidl
index 0af31badb163..81208ceba7ca 100644
--- a/components/script/dom/webidls/HTMLMeterElement.webidl
+++ b/components/script/dom/webidls/HTMLMeterElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlmeterelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLMeterElement : HTMLElement {
   // [CEReactions]
   //         attribute double value;
diff --git a/components/script/dom/webidls/HTMLModElement.webidl b/components/script/dom/webidls/HTMLModElement.webidl
index 93a58c7ad6f8..4a06a1ffa50a 100644
--- a/components/script/dom/webidls/HTMLModElement.webidl
+++ b/components/script/dom/webidls/HTMLModElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlmodelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLModElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString cite;
diff --git a/components/script/dom/webidls/HTMLOListElement.webidl b/components/script/dom/webidls/HTMLOListElement.webidl
index 3a3e992fcb3e..f5a720721c6a 100644
--- a/components/script/dom/webidls/HTMLOListElement.webidl
+++ b/components/script/dom/webidls/HTMLOListElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlolistelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLOListElement : HTMLElement {
   // [CEReactions]
   //         attribute boolean reversed;
diff --git a/components/script/dom/webidls/HTMLObjectElement.webidl b/components/script/dom/webidls/HTMLObjectElement.webidl
index 58c610418eb8..59cbe296df13 100644
--- a/components/script/dom/webidls/HTMLObjectElement.webidl
+++ b/components/script/dom/webidls/HTMLObjectElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlobjectelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLObjectElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString data;
diff --git a/components/script/dom/webidls/HTMLOptGroupElement.webidl b/components/script/dom/webidls/HTMLOptGroupElement.webidl
index b60bcb6f3dbd..faf8fdec8037 100644
--- a/components/script/dom/webidls/HTMLOptGroupElement.webidl
+++ b/components/script/dom/webidls/HTMLOptGroupElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmloptgroupelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLOptGroupElement : HTMLElement {
   [CEReactions]
            attribute boolean disabled;
diff --git a/components/script/dom/webidls/HTMLOptionElement.webidl b/components/script/dom/webidls/HTMLOptionElement.webidl
index 2100d77ee54c..1a618290b65b 100644
--- a/components/script/dom/webidls/HTMLOptionElement.webidl
+++ b/components/script/dom/webidls/HTMLOptionElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmloptionelement
-[HTMLConstructor/*, NamedConstructor=Option(optional DOMString text = "", optional DOMString value,
+[Exposed=Window, HTMLConstructor/*, NamedConstructor=Option(optional DOMString text = "", optional DOMString value,
                          optional boolean defaultSelected = false,
                          optional boolean selected = false)*/]
 interface HTMLOptionElement : HTMLElement {
diff --git a/components/script/dom/webidls/HTMLOptionsCollection.webidl b/components/script/dom/webidls/HTMLOptionsCollection.webidl
index 97edd3183654..91906b785fb4 100644
--- a/components/script/dom/webidls/HTMLOptionsCollection.webidl
+++ b/components/script/dom/webidls/HTMLOptionsCollection.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmloptionscollection
+[Exposed=Window]
 interface HTMLOptionsCollection : HTMLCollection {
   // inherits item(), namedItem()
   [CEReactions]
diff --git a/components/script/dom/webidls/HTMLOutputElement.webidl b/components/script/dom/webidls/HTMLOutputElement.webidl
index 440f0490f83a..3ce003729fb0 100644
--- a/components/script/dom/webidls/HTMLOutputElement.webidl
+++ b/components/script/dom/webidls/HTMLOutputElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmloutputelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLOutputElement : HTMLElement {
   // [SameObject, PutForwards=value] readonly attribute DOMTokenList htmlFor;
   readonly attribute HTMLFormElement? form;
diff --git a/components/script/dom/webidls/HTMLParagraphElement.webidl b/components/script/dom/webidls/HTMLParagraphElement.webidl
index d6eb3e7c5894..916d8ced83c0 100644
--- a/components/script/dom/webidls/HTMLParagraphElement.webidl
+++ b/components/script/dom/webidls/HTMLParagraphElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlparagraphelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLParagraphElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLParamElement.webidl b/components/script/dom/webidls/HTMLParamElement.webidl
index 69126afa4b89..232ed733439f 100644
--- a/components/script/dom/webidls/HTMLParamElement.webidl
+++ b/components/script/dom/webidls/HTMLParamElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlparamelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLParamElement : HTMLElement {
   // [CEReactions]
   //         attribute DOMString name;
diff --git a/components/script/dom/webidls/HTMLPictureElement.webidl b/components/script/dom/webidls/HTMLPictureElement.webidl
index 49038316c6e0..d63c879f3cda 100644
--- a/components/script/dom/webidls/HTMLPictureElement.webidl
+++ b/components/script/dom/webidls/HTMLPictureElement.webidl
@@ -3,5 +3,5 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlpictureelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLPictureElement : HTMLElement {};
diff --git a/components/script/dom/webidls/HTMLPreElement.webidl b/components/script/dom/webidls/HTMLPreElement.webidl
index 4ccbabb58e9c..cc3f0c7931c0 100644
--- a/components/script/dom/webidls/HTMLPreElement.webidl
+++ b/components/script/dom/webidls/HTMLPreElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlpreelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLPreElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLProgressElement.webidl b/components/script/dom/webidls/HTMLProgressElement.webidl
index 4cb6a8b4fd05..b52c09fe4545 100644
--- a/components/script/dom/webidls/HTMLProgressElement.webidl
+++ b/components/script/dom/webidls/HTMLProgressElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlprogresselement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLProgressElement : HTMLElement {
   // [CEReactions]
   //          attribute double value;
diff --git a/components/script/dom/webidls/HTMLQuoteElement.webidl b/components/script/dom/webidls/HTMLQuoteElement.webidl
index 5374c9f967b0..4fce3814bc43 100644
--- a/components/script/dom/webidls/HTMLQuoteElement.webidl
+++ b/components/script/dom/webidls/HTMLQuoteElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlquoteelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLQuoteElement : HTMLElement {
   // [CEReactions]
   //          attribute DOMString cite;
diff --git a/components/script/dom/webidls/HTMLScriptElement.webidl b/components/script/dom/webidls/HTMLScriptElement.webidl
index cfea1e61ed56..5d4f88903f55 100644
--- a/components/script/dom/webidls/HTMLScriptElement.webidl
+++ b/components/script/dom/webidls/HTMLScriptElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlscriptelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLScriptElement : HTMLElement {
   [CEReactions]
            attribute USVString src;
diff --git a/components/script/dom/webidls/HTMLSelectElement.webidl b/components/script/dom/webidls/HTMLSelectElement.webidl
index c8f70297b2f9..3c742aa0855c 100644
--- a/components/script/dom/webidls/HTMLSelectElement.webidl
+++ b/components/script/dom/webidls/HTMLSelectElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlselectelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLSelectElement : HTMLElement {
   // [CEReactions]
   //          attribute boolean autofocus;
diff --git a/components/script/dom/webidls/HTMLSourceElement.webidl b/components/script/dom/webidls/HTMLSourceElement.webidl
index cab2c3ba9f7d..56fbfb240d9e 100644
--- a/components/script/dom/webidls/HTMLSourceElement.webidl
+++ b/components/script/dom/webidls/HTMLSourceElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlsourceelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLSourceElement : HTMLElement {
   [CEReactions]
            attribute DOMString src;
diff --git a/components/script/dom/webidls/HTMLSpanElement.webidl b/components/script/dom/webidls/HTMLSpanElement.webidl
index 1a1e8a6f5e4d..5a1e32aef15a 100644
--- a/components/script/dom/webidls/HTMLSpanElement.webidl
+++ b/components/script/dom/webidls/HTMLSpanElement.webidl
@@ -3,5 +3,5 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlspanelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLSpanElement : HTMLElement {};
diff --git a/components/script/dom/webidls/HTMLStyleElement.webidl b/components/script/dom/webidls/HTMLStyleElement.webidl
index 09a2ba567f0c..3cb783fe3f99 100644
--- a/components/script/dom/webidls/HTMLStyleElement.webidl
+++ b/components/script/dom/webidls/HTMLStyleElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlstyleelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLStyleElement : HTMLElement {
   // [CEReactions]
   //          attribute DOMString media;
diff --git a/components/script/dom/webidls/HTMLTableCaptionElement.webidl b/components/script/dom/webidls/HTMLTableCaptionElement.webidl
index 69abba210a20..fbb0dd120719 100644
--- a/components/script/dom/webidls/HTMLTableCaptionElement.webidl
+++ b/components/script/dom/webidls/HTMLTableCaptionElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltablecaptionelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableCaptionElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLTableCellElement.webidl b/components/script/dom/webidls/HTMLTableCellElement.webidl
index 0705816a3871..cda6fbc3f066 100644
--- a/components/script/dom/webidls/HTMLTableCellElement.webidl
+++ b/components/script/dom/webidls/HTMLTableCellElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltablecellelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableCellElement : HTMLElement {
   [CEReactions]
            attribute unsigned long colSpan;
diff --git a/components/script/dom/webidls/HTMLTableColElement.webidl b/components/script/dom/webidls/HTMLTableColElement.webidl
index 8f76735232ff..463c31e45178 100644
--- a/components/script/dom/webidls/HTMLTableColElement.webidl
+++ b/components/script/dom/webidls/HTMLTableColElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltablecolelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableColElement : HTMLElement {
   // [CEReactions]
   //          attribute unsigned long span;
diff --git a/components/script/dom/webidls/HTMLTableElement.webidl b/components/script/dom/webidls/HTMLTableElement.webidl
index be7180ef90f7..fe3801654b16 100644
--- a/components/script/dom/webidls/HTMLTableElement.webidl
+++ b/components/script/dom/webidls/HTMLTableElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltableelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableElement : HTMLElement {
   [CEReactions]
            attribute HTMLTableCaptionElement? caption;
diff --git a/components/script/dom/webidls/HTMLTableRowElement.webidl b/components/script/dom/webidls/HTMLTableRowElement.webidl
index 64a5f5862556..ca823c334966 100644
--- a/components/script/dom/webidls/HTMLTableRowElement.webidl
+++ b/components/script/dom/webidls/HTMLTableRowElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltablerowelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableRowElement : HTMLElement {
   readonly attribute long rowIndex;
   readonly attribute long sectionRowIndex;
diff --git a/components/script/dom/webidls/HTMLTableSectionElement.webidl b/components/script/dom/webidls/HTMLTableSectionElement.webidl
index 4d41f8e9fdcf..f04dc5514fc7 100644
--- a/components/script/dom/webidls/HTMLTableSectionElement.webidl
+++ b/components/script/dom/webidls/HTMLTableSectionElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltablesectionelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTableSectionElement : HTMLElement {
   readonly attribute HTMLCollection rows;
   [Throws]
diff --git a/components/script/dom/webidls/HTMLTemplateElement.webidl b/components/script/dom/webidls/HTMLTemplateElement.webidl
index af0ca00308ed..73c19357c455 100644
--- a/components/script/dom/webidls/HTMLTemplateElement.webidl
+++ b/components/script/dom/webidls/HTMLTemplateElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltemplateelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTemplateElement : HTMLElement {
   readonly attribute DocumentFragment content;
 };
diff --git a/components/script/dom/webidls/HTMLTextAreaElement.webidl b/components/script/dom/webidls/HTMLTextAreaElement.webidl
index 396c994e5ea5..88c69ef19aa6 100644
--- a/components/script/dom/webidls/HTMLTextAreaElement.webidl
+++ b/components/script/dom/webidls/HTMLTextAreaElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltextareaelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTextAreaElement : HTMLElement {
   // [CEReactions]
   //          attribute DOMString autocomplete;
diff --git a/components/script/dom/webidls/HTMLTimeElement.webidl b/components/script/dom/webidls/HTMLTimeElement.webidl
index e391a4a850d4..b137c99ec1b2 100644
--- a/components/script/dom/webidls/HTMLTimeElement.webidl
+++ b/components/script/dom/webidls/HTMLTimeElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltimeelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTimeElement : HTMLElement {
   [CEReactions]
   attribute DOMString dateTime;
diff --git a/components/script/dom/webidls/HTMLTitleElement.webidl b/components/script/dom/webidls/HTMLTitleElement.webidl
index deb436b2afc6..8871eca3a707 100644
--- a/components/script/dom/webidls/HTMLTitleElement.webidl
+++ b/components/script/dom/webidls/HTMLTitleElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltitleelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTitleElement : HTMLElement {
     [CEReactions, Pure]
     attribute DOMString text;
diff --git a/components/script/dom/webidls/HTMLTrackElement.webidl b/components/script/dom/webidls/HTMLTrackElement.webidl
index c86c745deee5..fb9e616a449b 100644
--- a/components/script/dom/webidls/HTMLTrackElement.webidl
+++ b/components/script/dom/webidls/HTMLTrackElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmltrackelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLTrackElement : HTMLElement {
   [CEReactions]
            attribute DOMString kind;
diff --git a/components/script/dom/webidls/HTMLUListElement.webidl b/components/script/dom/webidls/HTMLUListElement.webidl
index bc8e3604baac..b543c91418c5 100644
--- a/components/script/dom/webidls/HTMLUListElement.webidl
+++ b/components/script/dom/webidls/HTMLUListElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlulistelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLUListElement : HTMLElement {
   // also has obsolete members
 };
diff --git a/components/script/dom/webidls/HTMLUnknownElement.webidl b/components/script/dom/webidls/HTMLUnknownElement.webidl
index a5fcab17bc4d..5e26b34468f0 100644
--- a/components/script/dom/webidls/HTMLUnknownElement.webidl
+++ b/components/script/dom/webidls/HTMLUnknownElement.webidl
@@ -11,5 +11,6 @@
  * and create derivative works of this document.
  */
 
+[Exposed=Window]
 interface HTMLUnknownElement : HTMLElement {
 };
diff --git a/components/script/dom/webidls/HTMLVideoElement.webidl b/components/script/dom/webidls/HTMLVideoElement.webidl
index c79aefafc991..582e017cc711 100644
--- a/components/script/dom/webidls/HTMLVideoElement.webidl
+++ b/components/script/dom/webidls/HTMLVideoElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#htmlvideoelement
-[HTMLConstructor]
+[Exposed=Window, HTMLConstructor]
 interface HTMLVideoElement : HTMLMediaElement {
   // [CEReactions]
   //          attribute unsigned long width;
diff --git a/components/script/dom/webidls/InputEvent.webidl b/components/script/dom/webidls/InputEvent.webidl
index 710f95d511ed..58699b643fa6 100644
--- a/components/script/dom/webidls/InputEvent.webidl
+++ b/components/script/dom/webidls/InputEvent.webidl
@@ -8,6 +8,7 @@
  */
 
 // https://w3c.github.io/uievents/#idl-inputevent
+[Exposed=Window]
 interface InputEvent : UIEvent {
   [Throws] constructor(DOMString type, optional InputEventInit eventInitDict = {});
   readonly attribute DOMString? data;
diff --git a/components/script/dom/webidls/KeyboardEvent.webidl b/components/script/dom/webidls/KeyboardEvent.webidl
index 85a74ead258b..6933a0105edf 100644
--- a/components/script/dom/webidls/KeyboardEvent.webidl
+++ b/components/script/dom/webidls/KeyboardEvent.webidl
@@ -7,6 +7,7 @@
  *
  */
 
+[Exposed=Window]
 interface KeyboardEvent : UIEvent {
     [Throws] constructor(DOMString typeArg, optional KeyboardEventInit keyboardEventInitDict = {});
     // KeyLocationCode
diff --git a/components/script/dom/webidls/MediaList.webidl b/components/script/dom/webidls/MediaList.webidl
index 53b19e446084..0851fb5c2202 100644
--- a/components/script/dom/webidls/MediaList.webidl
+++ b/components/script/dom/webidls/MediaList.webidl
@@ -4,6 +4,7 @@
 
 // https://drafts.csswg.org/cssom/#the-medialist-interface
 // [LegacyArrayClass]
+[Exposed=Window]
 interface MediaList {
   /* stringifier */ attribute [TreatNullAs=EmptyString] DOMString mediaText;
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/MutationObserver.webidl b/components/script/dom/webidls/MutationObserver.webidl
index 0ed66457dea3..7d75c5ed0c48 100644
--- a/components/script/dom/webidls/MutationObserver.webidl
+++ b/components/script/dom/webidls/MutationObserver.webidl
@@ -7,7 +7,7 @@
  */
 
 // https://dom.spec.whatwg.org/#mutationobserver
-[Pref="dom.mutation_observer.enabled"]
+[Exposed=Window, Pref="dom.mutation_observer.enabled"]
 interface MutationObserver {
     [Throws] constructor(MutationCallback callback);
     [Throws]
diff --git a/components/script/dom/webidls/NamedNodeMap.webidl b/components/script/dom/webidls/NamedNodeMap.webidl
index 008be870457b..15adeac68525 100644
--- a/components/script/dom/webidls/NamedNodeMap.webidl
+++ b/components/script/dom/webidls/NamedNodeMap.webidl
@@ -4,7 +4,7 @@
 
 // https://dom.spec.whatwg.org/#interface-namednodemap
 
-[LegacyUnenumerableNamedProperties]
+[Exposed=Window, LegacyUnenumerableNamedProperties]
 interface NamedNodeMap {
   [Pure]
   readonly attribute unsigned long length;
diff --git a/components/script/dom/webidls/Navigator.webidl b/components/script/dom/webidls/Navigator.webidl
index afd7aa7d5027..6b5b1e1f283a 100644
--- a/components/script/dom/webidls/Navigator.webidl
+++ b/components/script/dom/webidls/Navigator.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#navigator
+[Exposed=Window]
 interface Navigator {
   // objects implementing this interface also implement the interfaces given below
 };
diff --git a/components/script/dom/webidls/Node.webidl b/components/script/dom/webidls/Node.webidl
index 37943477bd30..6879518b0176 100644
--- a/components/script/dom/webidls/Node.webidl
+++ b/components/script/dom/webidls/Node.webidl
@@ -6,7 +6,7 @@
  * https://dom.spec.whatwg.org/#interface-node
  */
 
-[Abstract]
+[Exposed=Window, Abstract]
 interface Node : EventTarget {
   const unsigned short ELEMENT_NODE = 1;
   const unsigned short ATTRIBUTE_NODE = 2; // historical
diff --git a/components/script/dom/webidls/NodeFilter.webidl b/components/script/dom/webidls/NodeFilter.webidl
index 3b7b6cc68561..95e718ff7711 100644
--- a/components/script/dom/webidls/NodeFilter.webidl
+++ b/components/script/dom/webidls/NodeFilter.webidl
@@ -7,6 +7,7 @@
  */
 // Import from http://hg.mozilla.org/mozilla-central/file/a5a720259d79/dom/webidl/NodeFilter.webidl
 
+[Exposed=Window]
 callback interface NodeFilter {
   // Constants for acceptNode()
   const unsigned short FILTER_ACCEPT = 1;
diff --git a/components/script/dom/webidls/NodeIterator.webidl b/components/script/dom/webidls/NodeIterator.webidl
index 5687eb8bf858..9c9e1f41e802 100644
--- a/components/script/dom/webidls/NodeIterator.webidl
+++ b/components/script/dom/webidls/NodeIterator.webidl
@@ -6,6 +6,7 @@
  */
 // Import from http://hg.mozilla.org/mozilla-central/raw-file/a5a720259d79/dom/webidl/NodeIterator.webidl
 
+[Exposed=Window]
 interface NodeIterator {
   [SameObject]
   readonly attribute Node root;
diff --git a/components/script/dom/webidls/NodeList.webidl b/components/script/dom/webidls/NodeList.webidl
index 03567105d6f5..8ce65efb802f 100644
--- a/components/script/dom/webidls/NodeList.webidl
+++ b/components/script/dom/webidls/NodeList.webidl
@@ -6,6 +6,7 @@
  * https://dom.spec.whatwg.org/#interface-nodelist
  */
 
+[Exposed=Window]
 interface NodeList {
   [Pure]
   getter Node? item(unsigned long index);
diff --git a/components/script/dom/webidls/OESElementIndexUint.webidl b/components/script/dom/webidls/OESElementIndexUint.webidl
index f82e9414f135..01a441e9946e 100644
--- a/components/script/dom/webidls/OESElementIndexUint.webidl
+++ b/components/script/dom/webidls/OESElementIndexUint.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_element_index_uint/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESElementIndexUint {
 };
diff --git a/components/script/dom/webidls/OESStandardDerivatives.webidl b/components/script/dom/webidls/OESStandardDerivatives.webidl
index 53acd80565b7..0e4c51e4df35 100644
--- a/components/script/dom/webidls/OESStandardDerivatives.webidl
+++ b/components/script/dom/webidls/OESStandardDerivatives.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_standard_derivatives/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESStandardDerivatives {
     const GLenum FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B;
 };
diff --git a/components/script/dom/webidls/OESTextureFloat.webidl b/components/script/dom/webidls/OESTextureFloat.webidl
index 134e831381a5..f053a4059771 100644
--- a/components/script/dom/webidls/OESTextureFloat.webidl
+++ b/components/script/dom/webidls/OESTextureFloat.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_texture_float/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESTextureFloat {
 };
diff --git a/components/script/dom/webidls/OESTextureFloatLinear.webidl b/components/script/dom/webidls/OESTextureFloatLinear.webidl
index 117eb75cb165..f0abf5a1aac1 100644
--- a/components/script/dom/webidls/OESTextureFloatLinear.webidl
+++ b/components/script/dom/webidls/OESTextureFloatLinear.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_texture_float_linear/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESTextureFloatLinear {
 };
diff --git a/components/script/dom/webidls/OESTextureHalfFloat.webidl b/components/script/dom/webidls/OESTextureHalfFloat.webidl
index f18f90137254..cba71c8cb565 100644
--- a/components/script/dom/webidls/OESTextureHalfFloat.webidl
+++ b/components/script/dom/webidls/OESTextureHalfFloat.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_texture_half_float/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESTextureHalfFloat {
     const GLenum HALF_FLOAT_OES = 0x8D61;
 };
diff --git a/components/script/dom/webidls/OESTextureHalfFloatLinear.webidl b/components/script/dom/webidls/OESTextureHalfFloatLinear.webidl
index 9516ed403a6c..61454dd9cdba 100644
--- a/components/script/dom/webidls/OESTextureHalfFloatLinear.webidl
+++ b/components/script/dom/webidls/OESTextureHalfFloatLinear.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_texture_half_float_linear/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESTextureHalfFloatLinear {
 };
diff --git a/components/script/dom/webidls/OESVertexArrayObject.webidl b/components/script/dom/webidls/OESVertexArrayObject.webidl
index d15dcfda0d0a..21c59fd7a881 100644
--- a/components/script/dom/webidls/OESVertexArrayObject.webidl
+++ b/components/script/dom/webidls/OESVertexArrayObject.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface OESVertexArrayObject {
     const unsigned long VERTEX_ARRAY_BINDING_OES = 0x85B5;
 
diff --git a/components/script/dom/webidls/ProcessingInstruction.webidl b/components/script/dom/webidls/ProcessingInstruction.webidl
index acadb0f47e89..b3641badf1f8 100644
--- a/components/script/dom/webidls/ProcessingInstruction.webidl
+++ b/components/script/dom/webidls/ProcessingInstruction.webidl
@@ -6,6 +6,7 @@
  * https://dom.spec.whatwg.org/#interface-processinginstruction
  */
 
+[Exposed=Window]
 interface ProcessingInstruction : CharacterData {
   [Constant]
   readonly attribute DOMString target;
diff --git a/components/script/dom/webidls/RadioNodeList.webidl b/components/script/dom/webidls/RadioNodeList.webidl
index 8a6dfa0da392..6db8d2af3537 100644
--- a/components/script/dom/webidls/RadioNodeList.webidl
+++ b/components/script/dom/webidls/RadioNodeList.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#radionodelist
+[Exposed=Window]
 interface RadioNodeList : NodeList {
   attribute DOMString value;
 };
diff --git a/components/script/dom/webidls/Range.webidl b/components/script/dom/webidls/Range.webidl
index b897b049e99b..84cd80da0efe 100644
--- a/components/script/dom/webidls/Range.webidl
+++ b/components/script/dom/webidls/Range.webidl
@@ -8,6 +8,7 @@
  * http://dvcs.w3.org/hg/csswg/raw-file/tip/cssom-view/Overview.html#extensions-to-the-range-interface
  */
 
+[Exposed=Window]
 interface Range {
   [Throws] constructor();
   [Pure]
diff --git a/components/script/dom/webidls/SVGElement.webidl b/components/script/dom/webidls/SVGElement.webidl
index eb412d697352..51214b261164 100644
--- a/components/script/dom/webidls/SVGElement.webidl
+++ b/components/script/dom/webidls/SVGElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://svgwg.org/svg2-draft/types.html#InterfaceSVGElement
-[Abstract, Pref="dom.svg.enabled"]
+[Exposed=Window, Abstract, Pref="dom.svg.enabled"]
 interface SVGElement : Element {
 
   //[SameObject] readonly attribute SVGAnimatedString className;
diff --git a/components/script/dom/webidls/SVGGraphicsElement.webidl b/components/script/dom/webidls/SVGGraphicsElement.webidl
index 945c35bd5c34..052182e374da 100644
--- a/components/script/dom/webidls/SVGGraphicsElement.webidl
+++ b/components/script/dom/webidls/SVGGraphicsElement.webidl
@@ -10,7 +10,7 @@
 //  boolean clipped = false;
 //};
 
-[Abstract, Pref="dom.svg.enabled"]
+[Exposed=Window, Abstract, Pref="dom.svg.enabled"]
 interface SVGGraphicsElement : SVGElement {
   //[SameObject] readonly attribute SVGAnimatedTransformList transform;
 
diff --git a/components/script/dom/webidls/SVGSVGElement.webidl b/components/script/dom/webidls/SVGSVGElement.webidl
index bef4b08c7d45..0e61776a40e8 100644
--- a/components/script/dom/webidls/SVGSVGElement.webidl
+++ b/components/script/dom/webidls/SVGSVGElement.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://svgwg.org/svg2-draft/struct.html#InterfaceSVGSVGElement
-[Pref="dom.svg.enabled"]
+[Exposed=Window, Pref="dom.svg.enabled"]
 interface SVGSVGElement : SVGGraphicsElement {
 
   //[SameObject] readonly attribute SVGAnimatedLength x;
diff --git a/components/script/dom/webidls/Text.webidl b/components/script/dom/webidls/Text.webidl
index 21a556a22a85..0b0a980d0a9e 100644
--- a/components/script/dom/webidls/Text.webidl
+++ b/components/script/dom/webidls/Text.webidl
@@ -10,6 +10,7 @@
  */
 
 // https://dom.spec.whatwg.org/#text
+[Exposed=Window]
 interface Text : CharacterData {
   [Throws] constructor(optional DOMString data = "");
   [NewObject, Throws]
diff --git a/components/script/dom/webidls/Touch.webidl b/components/script/dom/webidls/Touch.webidl
index bbd94e2b2b86..c887a0fc2a32 100644
--- a/components/script/dom/webidls/Touch.webidl
+++ b/components/script/dom/webidls/Touch.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // http://w3c.github.io/touch-events/#idl-def-Touch
+[Exposed=Window]
 interface Touch {
     readonly    attribute long        identifier;
     readonly    attribute EventTarget target;
diff --git a/components/script/dom/webidls/TouchEvent.webidl b/components/script/dom/webidls/TouchEvent.webidl
index c5179c9f30da..3779349b7816 100644
--- a/components/script/dom/webidls/TouchEvent.webidl
+++ b/components/script/dom/webidls/TouchEvent.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // http://w3c.github.io/touch-events/#idl-def-TouchEvent
+[Exposed=Window]
 interface TouchEvent : UIEvent {
     readonly    attribute TouchList touches;
     readonly    attribute TouchList targetTouches;
diff --git a/components/script/dom/webidls/TouchList.webidl b/components/script/dom/webidls/TouchList.webidl
index 9a3a3932ac9c..bc6f7cb1304d 100644
--- a/components/script/dom/webidls/TouchList.webidl
+++ b/components/script/dom/webidls/TouchList.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // http://w3c.github.io/touch-events/#idl-def-TouchList
+[Exposed=Window]
 interface TouchList {
     readonly    attribute unsigned long length;
     getter Touch? item (unsigned long index);
diff --git a/components/script/dom/webidls/TreeWalker.webidl b/components/script/dom/webidls/TreeWalker.webidl
index 4b07302ba4ff..4162855dd09f 100644
--- a/components/script/dom/webidls/TreeWalker.webidl
+++ b/components/script/dom/webidls/TreeWalker.webidl
@@ -6,6 +6,7 @@
  * https://dom.spec.whatwg.org/#interface-treewalker
  */
 
+[Exposed=Window]
 interface TreeWalker {
   [SameObject]
   readonly attribute Node root;
diff --git a/components/script/dom/webidls/UIEvent.webidl b/components/script/dom/webidls/UIEvent.webidl
index b49e5d5701b0..12850f70e45d 100644
--- a/components/script/dom/webidls/UIEvent.webidl
+++ b/components/script/dom/webidls/UIEvent.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/uievents/#interface-uievent
+[Exposed=Window]
 interface UIEvent : Event {
   [Throws] constructor(DOMString type, optional UIEventInit eventInitDict = {});
   //  readonly    attribute WindowProxy? view;
diff --git a/components/script/dom/webidls/VRDisplay.webidl b/components/script/dom/webidls/VRDisplay.webidl
index 0eafc834926b..0cb636e1a32f 100644
--- a/components/script/dom/webidls/VRDisplay.webidl
+++ b/components/script/dom/webidls/VRDisplay.webidl
@@ -9,7 +9,7 @@ enum VREye {
 
 
 // https://w3c.github.io/webvr/#interface-vrdisplay
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRDisplay : EventTarget {
   readonly attribute boolean isConnected;
   readonly attribute boolean isPresenting;
diff --git a/components/script/dom/webidls/VRDisplayCapabilities.webidl b/components/script/dom/webidls/VRDisplayCapabilities.webidl
index b45687a80d4c..7bb915dfa52d 100644
--- a/components/script/dom/webidls/VRDisplayCapabilities.webidl
+++ b/components/script/dom/webidls/VRDisplayCapabilities.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/webvr/#interface-vrdisplaycapabilities
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRDisplayCapabilities {
   readonly attribute boolean hasPosition;
   readonly attribute boolean hasOrientation;
diff --git a/components/script/dom/webidls/VRDisplayEvent.webidl b/components/script/dom/webidls/VRDisplayEvent.webidl
index c4207d51b7ef..a10b9ca86244 100644
--- a/components/script/dom/webidls/VRDisplayEvent.webidl
+++ b/components/script/dom/webidls/VRDisplayEvent.webidl
@@ -11,7 +11,7 @@ enum VRDisplayEventReason {
   "requested"
 };
 
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRDisplayEvent : Event {
   [Throws] constructor(DOMString type, VRDisplayEventInit eventInitDict);
   readonly attribute VRDisplay display;
diff --git a/components/script/dom/webidls/VREyeParameters.webidl b/components/script/dom/webidls/VREyeParameters.webidl
index 49ad5503ed74..f9fd71c8e99d 100644
--- a/components/script/dom/webidls/VREyeParameters.webidl
+++ b/components/script/dom/webidls/VREyeParameters.webidl
@@ -4,7 +4,7 @@
 
 // https://w3c.github.io/webvr/#interface-vreyeparameters
 
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VREyeParameters {
   readonly attribute Float32Array offset;
   [SameObject] readonly attribute VRFieldOfView fieldOfView;
diff --git a/components/script/dom/webidls/VRFieldOfView.webidl b/components/script/dom/webidls/VRFieldOfView.webidl
index 568cfd48ce5f..bdd967583585 100644
--- a/components/script/dom/webidls/VRFieldOfView.webidl
+++ b/components/script/dom/webidls/VRFieldOfView.webidl
@@ -4,7 +4,7 @@
 
 // https://w3c.github.io/webvr/#interface-vrfieldofview
 
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRFieldOfView {
   readonly attribute double upDegrees;
   readonly attribute double rightDegrees;
diff --git a/components/script/dom/webidls/VRFrameData.webidl b/components/script/dom/webidls/VRFrameData.webidl
index 5b95df05ffb4..4c7c4695a8cd 100644
--- a/components/script/dom/webidls/VRFrameData.webidl
+++ b/components/script/dom/webidls/VRFrameData.webidl
@@ -4,7 +4,7 @@
 
 // https://w3c.github.io/webvr/#interface-vrframedata
 
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRFrameData {
   [Throws] constructor();
   readonly attribute DOMHighResTimeStamp timestamp;
diff --git a/components/script/dom/webidls/VRPose.webidl b/components/script/dom/webidls/VRPose.webidl
index 88bd7090a362..7fb19c60da11 100644
--- a/components/script/dom/webidls/VRPose.webidl
+++ b/components/script/dom/webidls/VRPose.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/webvr/#interface-vrpose
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRPose {
   readonly attribute Float32Array? position;
   readonly attribute Float32Array? linearVelocity;
diff --git a/components/script/dom/webidls/VRStageParameters.webidl b/components/script/dom/webidls/VRStageParameters.webidl
index 8f3beb3e723c..5816dd55db5c 100644
--- a/components/script/dom/webidls/VRStageParameters.webidl
+++ b/components/script/dom/webidls/VRStageParameters.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://w3c.github.io/webvr/#interface-vrstageparameters
-[Pref="dom.webvr.enabled"]
+[Exposed=Window, Pref="dom.webvr.enabled"]
 interface VRStageParameters {
   readonly attribute Float32Array sittingToStandingTransform;
   readonly attribute float sizeX;
diff --git a/components/script/dom/webidls/ValidityState.webidl b/components/script/dom/webidls/ValidityState.webidl
index 7a980f440c37..a1a553e91ff0 100644
--- a/components/script/dom/webidls/ValidityState.webidl
+++ b/components/script/dom/webidls/ValidityState.webidl
@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#validitystate
+[Exposed=Window]
 interface ValidityState {
   readonly attribute boolean valueMissing;
   readonly attribute boolean typeMismatch;
diff --git a/components/script/dom/webidls/WEBGLColorBufferFloat.webidl b/components/script/dom/webidls/WEBGLColorBufferFloat.webidl
index 2023b46c16e7..dd041927ec1c 100644
--- a/components/script/dom/webidls/WEBGLColorBufferFloat.webidl
+++ b/components/script/dom/webidls/WEBGLColorBufferFloat.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/WEBGL_color_buffer_float/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface WEBGLColorBufferFloat {
   const GLenum RGBA32F_EXT = 0x8814;
   const GLenum FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT = 0x8211;
diff --git a/components/script/dom/webidls/WEBGLCompressedTextureETC1.webidl b/components/script/dom/webidls/WEBGLCompressedTextureETC1.webidl
index c8ba921764d4..77f80197c976 100644
--- a/components/script/dom/webidls/WEBGLCompressedTextureETC1.webidl
+++ b/components/script/dom/webidls/WEBGLCompressedTextureETC1.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_etc1/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface WEBGLCompressedTextureETC1 {
     /* Compressed Texture Format */
     const GLenum COMPRESSED_RGB_ETC1_WEBGL = 0x8D64;
diff --git a/components/script/dom/webidls/WEBGLCompressedTextureS3TC.webidl b/components/script/dom/webidls/WEBGLCompressedTextureS3TC.webidl
index 0da53b81c170..f940028bf5d9 100644
--- a/components/script/dom/webidls/WEBGLCompressedTextureS3TC.webidl
+++ b/components/script/dom/webidls/WEBGLCompressedTextureS3TC.webidl
@@ -6,7 +6,7 @@
  * https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface WEBGLCompressedTextureS3TC {
     /* Compressed Texture Formats */
     const GLenum COMPRESSED_RGB_S3TC_DXT1_EXT  = 0x83F0;
diff --git a/components/script/dom/webidls/WebGL2RenderingContext.webidl b/components/script/dom/webidls/WebGL2RenderingContext.webidl
index d46f3099f601..9162b71a2305 100644
--- a/components/script/dom/webidls/WebGL2RenderingContext.webidl
+++ b/components/script/dom/webidls/WebGL2RenderingContext.webidl
@@ -576,7 +576,7 @@ interface mixin WebGL2RenderingContextBase
   void bindVertexArray(WebGLVertexArrayObject? array);*/
 };
 
-[Pref="dom.webgl2.enabled"]
+[Exposed=Window, Pref="dom.webgl2.enabled"]
 interface WebGL2RenderingContext
 {
 };
diff --git a/components/script/dom/webidls/WebGLSync.webidl b/components/script/dom/webidls/WebGLSync.webidl
index 3b251b8cf873..f8cd33ef9cef 100644
--- a/components/script/dom/webidls/WebGLSync.webidl
+++ b/components/script/dom/webidls/WebGLSync.webidl
@@ -6,6 +6,6 @@
 // https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.14
 //
 
-[Pref="dom.webgl2.enabled"]
+[Exposed=Window, Pref="dom.webgl2.enabled"]
 interface WebGLSync : WebGLObject {
 };
diff --git a/components/script/dom/webidls/WebGLVertexArrayObjectOES.webidl b/components/script/dom/webidls/WebGLVertexArrayObjectOES.webidl
index 55964f3363e0..e576bd6089dd 100644
--- a/components/script/dom/webidls/WebGLVertexArrayObjectOES.webidl
+++ b/components/script/dom/webidls/WebGLVertexArrayObjectOES.webidl
@@ -6,6 +6,6 @@
  * https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
  */
 
-[NoInterfaceObject]
+[NoInterfaceObject, Exposed=Window]
 interface WebGLVertexArrayObjectOES: WebGLObject {
 };
diff --git a/components/script/dom/webidls/Window.webidl b/components/script/dom/webidls/Window.webidl
index 56907a9f7be3..65944aa3eb14 100644
--- a/components/script/dom/webidls/Window.webidl
+++ b/components/script/dom/webidls/Window.webidl
@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 // https://html.spec.whatwg.org/multipage/#window
-[PrimaryGlobal]
+[Global=Window, Exposed=Window]
 /*sealed*/ interface Window : GlobalScope {
   // the current browsing context
   [Unforgeable] readonly attribute WindowProxy window;
diff --git a/components/script/dom/webidls/XMLDocument.webidl b/components/script/dom/webidls/XMLDocument.webidl
index 9d6a32c2b4f9..64d11d29cd76 100644
--- a/components/script/dom/webidls/XMLDocument.webidl
+++ b/components/script/dom/webidls/XMLDocument.webidl
@@ -8,4 +8,5 @@
  */
 
 // https://dom.spec.whatwg.org/#interface-document
+[Exposed=Window]
 interface XMLDocument : Document {};
diff --git a/components/script/dom/webidls/XMLSerializer.webidl b/components/script/dom/webidls/XMLSerializer.webidl
index e93d35467874..c0111220e420 100644
--- a/components/script/dom/webidls/XMLSerializer.webidl
+++ b/components/script/dom/webidls/XMLSerializer.webidl
@@ -6,6 +6,7 @@
  * https://w3c.github.io/DOM-Parsing/#the-domparser-interface
  */
 
+[Exposed=Window]
 interface XMLSerializer {
   [Throws] constructor();
   [Throws]