diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index fe6109e9db38c..c305d3ca75e5d 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -1786827,6 +1786827,54 @@ worker
 /
 resources
 /
+scope1
+/
+redirect
+.
+py
+"
+:
+[
+[
+{
+}
+]
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+scope2
+/
+worker_interception_redirect_webworker
+.
+py
+"
+:
+[
+[
+{
+}
+]
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
 service
 -
 worker
@@ -1787635,6 +1787683,62 @@ resources
 /
 worker
 -
+interception
+-
+redirect
+-
+serviceworker
+.
+js
+"
+:
+[
+[
+{
+}
+]
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+worker
+-
+interception
+-
+redirect
+-
+webworker
+.
+js
+"
+:
+[
+[
+{
+}
+]
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+worker
+-
 load
 -
 interceptor
@@ -1787677,6 +1787781,28 @@ service
 -
 workers
 /
+service
+-
+worker
+/
+resources
+/
+worker_interception_redirect_webworker
+.
+py
+"
+:
+[
+[
+{
+}
+]
+]
+"
+service
+-
+workers
+/
 specgen
 .
 json
@@ -2359312,6 +2359438,52 @@ worker
 worker
 -
 interception
+-
+redirect
+.
+https
+.
+html
+"
+:
+[
+[
+"
+/
+service
+-
+workers
+/
+service
+-
+worker
+/
+worker
+-
+interception
+-
+redirect
+.
+https
+.
+html
+"
+{
+}
+]
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+worker
+-
+interception
 .
 https
 .
@@ -4036670,6 +4036842,58 @@ worker
 /
 resources
 /
+scope1
+/
+redirect
+.
+py
+"
+:
+[
+"
+7741f204c67ca71087df3b182826bc28c14dbe37
+"
+"
+support
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+scope2
+/
+worker_interception_redirect_webworker
+.
+py
+"
+:
+[
+"
+c482ed2a7ff5ed2d663bd54ee2ecd2f6609d77cd
+"
+"
+support
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
 service
 -
 worker
@@ -4037540,6 +4037764,66 @@ resources
 /
 worker
 -
+interception
+-
+redirect
+-
+serviceworker
+.
+js
+"
+:
+[
+"
+05a2f3a4ad034b9cece10b5abc7ffff71bfcb4aa
+"
+"
+support
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+worker
+-
+interception
+-
+redirect
+-
+webworker
+.
+js
+"
+:
+[
+"
+615f6dd41ee6f9f141132a48544f976ce0403d27
+"
+"
+support
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+worker
+-
 load
 -
 interceptor
@@ -4037590,6 +4037874,30 @@ service
 -
 worker
 /
+resources
+/
+worker_interception_redirect_webworker
+.
+py
+"
+:
+[
+"
+37a8a7bd94cc529420eba8838e1e20056caf2945
+"
+"
+support
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
 respond
 -
 with
@@ -4038553,6 +4038861,34 @@ worker
 worker
 -
 interception
+-
+redirect
+.
+https
+.
+html
+"
+:
+[
+"
+8654d94e9797ac332bedcadeed61837ccf13b944
+"
+"
+testharness
+"
+]
+"
+service
+-
+workers
+/
+service
+-
+worker
+/
+worker
+-
+interception
 .
 https
 .
diff --git a/testing/web-platform/tests/service-workers/service-worker/resources/scope1/redirect.py b/testing/web-platform/tests/service-workers/service-worker/resources/scope1/redirect.py
new file mode 100644
index 0000000000000..b1741a3f35809
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/resources/scope1/redirect.py
@@ -0,0 +1,39 @@
+import
+os
+import
+sys
+#
+Use
+the
+file
+from
+the
+parent
+directory
+.
+sys
+.
+path
+.
+append
+(
+os
+.
+path
+.
+dirname
+(
+os
+.
+path
+.
+dirname
+(
+__file__
+)
+)
+)
+from
+redirect
+import
+main
diff --git a/testing/web-platform/tests/service-workers/service-worker/resources/scope2/worker_interception_redirect_webworker.py b/testing/web-platform/tests/service-workers/service-worker/resources/scope2/worker_interception_redirect_webworker.py
new file mode 100644
index 0000000000000..5ee4e81a99db9
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/resources/scope2/worker_interception_redirect_webworker.py
@@ -0,0 +1,39 @@
+import
+os
+import
+sys
+#
+Use
+the
+file
+from
+the
+parent
+directory
+.
+sys
+.
+path
+.
+append
+(
+os
+.
+path
+.
+dirname
+(
+os
+.
+path
+.
+dirname
+(
+__file__
+)
+)
+)
+from
+worker_interception_redirect_webworker
+import
+main
diff --git a/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-serviceworker.js b/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-serviceworker.js
new file mode 100644
index 0000000000000..101aaf6e3aa13
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-serviceworker.js
@@ -0,0 +1,394 @@
+let
+name
+;
+if
+(
+self
+.
+registration
+.
+scope
+.
+indexOf
+(
+'
+scope1
+'
+)
+!
+=
+-
+1
+)
+name
+=
+'
+sw1
+'
+;
+if
+(
+self
+.
+registration
+.
+scope
+.
+indexOf
+(
+'
+scope2
+'
+)
+!
+=
+-
+1
+)
+name
+=
+'
+sw2
+'
+;
+self
+.
+addEventListener
+(
+'
+fetch
+'
+evt
+=
+>
+{
+/
+/
+There
+are
+three
+types
+of
+requests
+this
+service
+worker
+handles
+.
+/
+/
+(
+1
+)
+The
+first
+request
+for
+the
+worker
+which
+will
+redirect
+elsewhere
+.
+/
+/
+"
+redirect
+.
+py
+"
+means
+to
+test
+network
+redirect
+so
+let
+network
+handle
+it
+.
+if
+(
+evt
+.
+request
+.
+url
+.
+indexOf
+(
+'
+redirect
+.
+py
+'
+)
+!
+=
+-
+1
+)
+{
+return
+;
+}
+/
+/
+"
+sw
+-
+redirect
+"
+means
+to
+test
+service
+worker
+redirect
+so
+respond
+with
+a
+/
+/
+redirect
+.
+if
+(
+evt
+.
+request
+.
+url
+.
+indexOf
+(
+'
+sw
+-
+redirect
+'
+)
+!
+=
+-
+1
+)
+{
+const
+url
+=
+new
+URL
+(
+evt
+.
+request
+.
+url
+)
+;
+const
+redirect_to
+=
+url
+.
+searchParams
+.
+get
+(
+'
+Redirect
+'
+)
+;
+evt
+.
+respondWith
+(
+Response
+.
+redirect
+(
+redirect_to
+)
+)
+;
+return
+;
+}
+/
+/
+(
+2
+)
+After
+redirect
+the
+request
+is
+for
+a
+"
+webworker
+.
+py
+"
+URL
+.
+/
+/
+Add
+a
+search
+parameter
+to
+indicate
+this
+service
+worker
+handled
+the
+/
+/
+final
+request
+for
+the
+worker
+.
+if
+(
+evt
+.
+request
+.
+url
+.
+indexOf
+(
+'
+webworker
+.
+py
+'
+)
+!
+=
+-
+1
+)
+{
+const
+greeting
+=
+encodeURIComponent
+(
+{
+name
+}
+saw
+the
+request
+for
+the
+worker
+script
+)
+;
+evt
+.
+respondWith
+(
+fetch
+(
+worker_interception_redirect_webworker
+.
+py
+?
+greeting
+=
+{
+greeting
+}
+)
+)
+;
+return
+;
+}
+/
+/
+(
+3
+)
+The
+worker
+does
+a
+fetch
+(
+)
+to
+simple
+.
+txt
+.
+Indicate
+that
+this
+service
+/
+/
+worker
+handled
+the
+request
+.
+if
+(
+evt
+.
+request
+.
+url
+.
+indexOf
+(
+'
+simple
+.
+txt
+'
+)
+!
+=
+-
+1
+)
+{
+evt
+.
+respondWith
+(
+new
+Response
+(
+{
+name
+}
+saw
+the
+fetch
+from
+the
+worker
+)
+)
+;
+}
+}
+)
+;
diff --git a/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-webworker.js b/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-webworker.js
new file mode 100644
index 0000000000000..361a499cf77d2
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/resources/worker-interception-redirect-webworker.js
@@ -0,0 +1,288 @@
+/
+/
+This
+is
+the
+(
+shared
+or
+dedicated
+)
+worker
+file
+for
+the
+/
+/
+worker
+-
+interception
+-
+redirect
+test
+.
+It
+should
+be
+served
+by
+the
+corresponding
+/
+/
+.
+py
+file
+instead
+of
+being
+served
+directly
+.
+/
+/
+/
+/
+This
+file
+is
+served
+from
+both
+resources
+/
+*
+webworker
+.
+py
+and
+/
+/
+resources
+/
+scope2
+/
+*
+webworker
+.
+py
+hence
+some
+of
+the
+complexity
+/
+/
+below
+about
+paths
+.
+const
+resources_url
+=
+new
+URL
+(
+"
+/
+service
+-
+workers
+/
+service
+-
+worker
+/
+resources
+/
+"
+self
+.
+location
+)
+;
+/
+/
+This
+greeting
+text
+is
+meant
+to
+be
+injected
+by
+the
+Python
+script
+that
+serves
+/
+/
+this
+file
+to
+indicate
+how
+the
+script
+was
+served
+(
+from
+network
+or
+from
+/
+/
+service
+worker
+)
+.
+/
+/
+/
+/
+We
+can
+'
+t
+just
+use
+a
+sub
+pipe
+and
+name
+this
+file
+.
+sub
+.
+js
+since
+we
+want
+/
+/
+to
+serve
+the
+file
+from
+multiple
+URLs
+(
+see
+above
+)
+.
+let
+greeting
+=
+'
+%
+GREETING_TEXT
+%
+'
+;
+if
+(
+!
+greeting
+)
+greeting
+=
+'
+the
+shared
+worker
+script
+was
+served
+from
+network
+'
+;
+self
+.
+onconnect
+=
+async
+function
+(
+e
+)
+{
+const
+port
+=
+e
+.
+ports
+[
+0
+]
+;
+port
+.
+start
+(
+)
+;
+port
+.
+postMessage
+(
+greeting
+)
+;
+const
+fetch_url
+=
+new
+URL
+(
+'
+simple
+.
+txt
+'
+resources_url
+)
+;
+const
+response
+=
+await
+fetch
+(
+fetch_url
+)
+;
+const
+text
+=
+await
+response
+.
+text
+(
+)
+;
+port
+.
+postMessage
+(
+'
+fetch
+(
+)
+:
+'
++
+text
+)
+;
+}
+;
diff --git a/testing/web-platform/tests/service-workers/service-worker/resources/worker_interception_redirect_webworker.py b/testing/web-platform/tests/service-workers/service-worker/resources/worker_interception_redirect_webworker.py
new file mode 100644
index 0000000000000..1fddfea10143e
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/resources/worker_interception_redirect_webworker.py
@@ -0,0 +1,163 @@
+#
+This
+serves
+the
+worker
+JavaScript
+file
+.
+It
+takes
+a
+|
+greeting
+|
+request
+#
+parameter
+to
+inject
+into
+the
+JavaScript
+to
+indicate
+how
+the
+request
+#
+reached
+the
+server
+.
+import
+os
+import
+sys
+def
+main
+(
+request
+response
+)
+:
+  
+path
+=
+os
+.
+path
+.
+join
+(
+os
+.
+path
+.
+dirname
+(
+__file__
+)
+                      
+"
+worker
+-
+interception
+-
+redirect
+-
+webworker
+.
+js
+"
+)
+  
+body
+=
+open
+(
+path
+"
+rb
+"
+)
+.
+read
+(
+)
+  
+if
+"
+greeting
+"
+in
+request
+.
+GET
+:
+    
+body
+=
+body
+.
+replace
+(
+"
+%
+GREETING_TEXT
+%
+"
+request
+.
+GET
+[
+"
+greeting
+"
+]
+)
+  
+else
+:
+    
+body
+=
+body
+.
+replace
+(
+"
+%
+GREETING_TEXT
+%
+"
+"
+"
+)
+  
+headers
+=
+[
+]
+  
+headers
+.
+append
+(
+(
+"
+Content
+-
+Type
+"
+"
+text
+/
+javascript
+"
+)
+)
+  
+return
+headers
+body
diff --git a/testing/web-platform/tests/service-workers/service-worker/worker-interception-redirect.https.html b/testing/web-platform/tests/service-workers/service-worker/worker-interception-redirect.https.html
new file mode 100644
index 0000000000000..d0367abd4e34e
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/worker-interception-redirect.https.html
@@ -0,0 +1,1560 @@
+<
+!
+DOCTYPE
+html
+>
+<
+title
+>
+Service
+Worker
+:
+controlling
+a
+SharedWorker
+<
+/
+title
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharness
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharnessreport
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+src
+=
+"
+resources
+/
+test
+-
+helpers
+.
+sub
+.
+js
+"
+>
+<
+/
+script
+>
+<
+body
+>
+<
+script
+>
+/
+/
+This
+tests
+service
+worker
+interception
+for
+worker
+clients
+when
+the
+request
+/
+/
+for
+the
+worker
+script
+goes
+through
+redirects
+.
+For
+example
+a
+request
+can
+go
+/
+/
+through
+a
+chain
+of
+URLs
+like
+A
+-
+>
+B
+-
+>
+C
+-
+>
+D
+and
+each
+URL
+might
+fall
+in
+the
+/
+/
+scope
+of
+a
+different
+service
+worker
+if
+any
+.
+/
+/
+The
+two
+key
+questions
+are
+:
+/
+/
+1
+.
+Upon
+a
+redirect
+from
+A
+-
+>
+B
+should
+a
+service
+worker
+for
+scope
+B
+/
+/
+intercept
+the
+request
+?
+/
+/
+2
+.
+After
+the
+final
+response
+which
+service
+worker
+controls
+the
+resulting
+/
+/
+client
+?
+/
+/
+/
+/
+The
+standard
+prescribes
+the
+following
+:
+/
+/
+1
+.
+The
+service
+worker
+for
+scope
+B
+intercepts
+the
+redirect
+.
+*
+However
+*
+once
+a
+/
+/
+request
+falls
+back
+to
+network
+(
+i
+.
+e
+.
+a
+service
+worker
+did
+not
+call
+/
+/
+respondWith
+(
+)
+)
+and
+a
+redirect
+is
+then
+received
+from
+network
+no
+service
+/
+/
+worker
+should
+intercept
+that
+redirect
+or
+any
+subsequent
+redirects
+.
+/
+/
+2
+.
+The
+final
+service
+worker
+that
+got
+a
+fetch
+event
+(
+or
+would
+have
+in
+the
+/
+/
+case
+of
+a
+non
+-
+fetch
+-
+event
+worker
+)
+becomes
+the
+controller
+of
+the
+client
+.
+/
+/
+/
+/
+The
+standard
+may
+change
+later
+see
+:
+/
+/
+https
+:
+/
+/
+github
+.
+com
+/
+w3c
+/
+ServiceWorker
+/
+issues
+/
+1289
+/
+/
+/
+/
+The
+basic
+test
+setup
+is
+:
+/
+/
+1
+.
+Page
+registers
+service
+workers
+for
+scope1
+and
+scope2
+.
+/
+/
+2
+.
+Page
+requests
+a
+worker
+from
+scope1
+.
+/
+/
+3
+.
+The
+request
+is
+redirected
+to
+scope2
+or
+out
+-
+of
+-
+scope
+.
+/
+/
+4
+.
+The
+worker
+posts
+message
+to
+the
+page
+describing
+where
+the
+final
+response
+/
+/
+was
+served
+from
+(
+service
+worker
+or
+network
+)
+.
+/
+/
+5
+.
+The
+worker
+does
+a
+fetch
+(
+)
+and
+posts
+back
+the
+response
+which
+describes
+/
+/
+where
+the
+fetch
+response
+was
+served
+from
+.
+/
+/
+/
+/
+Currently
+this
+only
+tests
+shared
+worker
+but
+dedicated
+worker
+tests
+should
+be
+/
+/
+added
+in
+a
+future
+patch
+.
+/
+/
+Globals
+for
+easier
+cleanup
+.
+const
+scope1
+=
+'
+resources
+/
+scope1
+'
+;
+const
+scope2
+=
+'
+resources
+/
+scope2
+'
+;
+let
+frame
+;
+function
+get_message_from_worker
+(
+worker
+)
+{
+return
+new
+Promise
+(
+resolve
+=
+>
+{
+worker
+.
+port
+.
+onmessage
+=
+evt
+=
+>
+{
+resolve
+(
+evt
+.
+data
+)
+;
+}
+}
+)
+;
+}
+async
+function
+cleanup
+(
+)
+{
+if
+(
+frame
+)
+frame
+.
+remove
+(
+)
+;
+const
+reg1
+=
+await
+navigator
+.
+serviceWorker
+.
+getRegistration
+(
+scope1
+)
+;
+if
+(
+reg1
+)
+await
+reg1
+.
+unregister
+(
+)
+;
+const
+reg2
+=
+await
+navigator
+.
+serviceWorker
+.
+getRegistration
+(
+scope2
+)
+;
+if
+(
+reg2
+)
+await
+reg2
+.
+unregister
+(
+)
+;
+}
+/
+/
+Builds
+the
+worker
+script
+URL
+which
+encodes
+information
+about
+where
+/
+/
+to
+redirect
+to
+.
+The
+URL
+falls
+in
+sw1
+'
+s
+scope
+.
+/
+/
+/
+/
+-
+|
+redirector
+|
+is
+"
+network
+"
+or
+"
+serviceworker
+"
+.
+If
+"
+serviceworker
+"
+sw1
+will
+/
+/
+respondWith
+(
+)
+a
+redirect
+.
+Otherwise
+it
+falls
+back
+to
+network
+and
+the
+server
+/
+/
+responds
+with
+a
+redirect
+.
+/
+/
+-
+|
+redirect_location
+|
+is
+"
+scope2
+"
+or
+"
+out
+-
+of
+-
+scope
+"
+.
+If
+"
+scope2
+"
+the
+/
+/
+redirect
+ends
+up
+in
+sw2
+'
+s
+scope2
+.
+Otherwise
+it
+'
+s
+out
+of
+scope
+.
+function
+build_worker_url
+(
+redirector
+redirect_location
+)
+{
+let
+redirect_path
+;
+/
+/
+Set
+path
+to
+redirect
+.
+py
+a
+file
+on
+the
+server
+that
+serves
+/
+/
+a
+redirect
+.
+When
+sw1
+sees
+this
+URL
+it
+falls
+back
+to
+network
+.
+if
+(
+redirector
+=
+=
+'
+network
+'
+)
+redirector_path
+=
+'
+redirect
+.
+py
+'
+;
+/
+/
+Set
+path
+to
+'
+sw
+-
+redirect
+'
+to
+tell
+the
+service
+worker
+/
+/
+to
+respond
+with
+redirect
+.
+else
+if
+(
+redirector
+=
+=
+'
+serviceworker
+'
+)
+redirector_path
+=
+'
+sw
+-
+redirect
+'
+;
+let
+redirect_to
+=
+base_path
+(
+)
++
+'
+resources
+/
+'
+;
+/
+/
+Append
+"
+scope2
+/
+"
+to
+redirect_to
+so
+the
+redirect
+falls
+in
+scope2
+.
+/
+/
+Otherwise
+no
+change
+is
+needed
+as
+the
+parent
+"
+resources
+/
+"
+directory
+is
+/
+/
+used
+and
+is
+out
+-
+of
+-
+scope
+.
+if
+(
+redirect_location
+=
+=
+'
+scope2
+'
+)
+redirect_to
++
+=
+'
+scope2
+/
+'
+;
+/
+/
+Append
+the
+name
+of
+the
+file
+which
+serves
+the
+worker
+script
+.
+redirect_to
++
+=
+'
+worker_interception_redirect_webworker
+.
+py
+'
+;
+return
+scope1
+/
+{
+redirector_path
+}
+?
+Redirect
+=
+{
+redirect_to
+}
+}
+promise_test
+(
+async
+t
+=
+>
+{
+await
+cleanup
+(
+)
+;
+const
+service_worker
+=
+'
+resources
+/
+worker
+-
+interception
+-
+redirect
+-
+serviceworker
+.
+js
+'
+;
+const
+registration1
+=
+await
+navigator
+.
+serviceWorker
+.
+register
+(
+service_worker
+{
+scope
+:
+scope1
+}
+)
+;
+await
+wait_for_state
+(
+t
+registration1
+.
+installing
+'
+activated
+'
+)
+;
+const
+registration2
+=
+await
+navigator
+.
+serviceWorker
+.
+register
+(
+service_worker
+{
+scope
+:
+scope2
+}
+)
+;
+await
+wait_for_state
+(
+t
+registration2
+.
+installing
+'
+activated
+'
+)
+;
+promise_test
+(
+t
+=
+>
+{
+return
+cleanup
+(
+)
+;
+}
+'
+cleanup
+global
+state
+'
+)
+;
+}
+'
+initialize
+global
+state
+'
+)
+;
+function
+worker_redirect_test
+(
+worker_url
+expected_main_resource_message
+expected_subresource_message
+description
+)
+{
+promise_test
+(
+async
+t
+=
+>
+{
+/
+/
+Create
+a
+frame
+to
+load
+the
+worker
+from
+.
+This
+way
+we
+can
+remove
+the
+frame
+/
+/
+to
+destroy
+the
+worker
+client
+when
+the
+test
+is
+done
+.
+frame
+=
+await
+with_iframe
+(
+'
+resources
+/
+blank
+.
+html
+'
+)
+;
+t
+.
+add_cleanup
+(
+(
+)
+=
+>
+{
+frame
+.
+remove
+(
+)
+;
+}
+)
+;
+/
+/
+Start
+the
+worker
+.
+const
+w
+=
+new
+frame
+.
+contentWindow
+.
+SharedWorker
+(
+worker_url
+)
+;
+w
+.
+port
+.
+start
+(
+)
+;
+/
+/
+Expect
+a
+message
+from
+the
+worker
+indicating
+which
+service
+worker
+/
+/
+provided
+the
+response
+for
+the
+worker
+script
+request
+if
+any
+.
+const
+data
+=
+await
+get_message_from_worker
+(
+w
+)
+;
+assert_equals
+(
+data
+expected_main_resource_message
+)
+;
+/
+/
+The
+worker
+does
+a
+fetch
+(
+)
+after
+it
+starts
+up
+.
+Expect
+a
+message
+from
+the
+/
+/
+worker
+indicating
+which
+service
+worker
+provided
+the
+response
+for
+the
+/
+/
+fetch
+(
+)
+if
+any
+.
+/
+/
+/
+/
+Note
+:
+for
+some
+reason
+Firefox
+would
+pass
+all
+these
+tests
+if
+a
+/
+/
+postMessage
+ping
+/
+pong
+step
+is
+added
+before
+the
+fetch
+(
+)
+.
+I
+.
+e
+.
+if
+the
+/
+/
+page
+does
+postMessage
+(
+)
+and
+the
+worker
+does
+fetch
+(
+)
+in
+response
+to
+the
+/
+/
+ping
+the
+fetch
+(
+)
+is
+properly
+intercepted
+.
+See
+/
+/
+https
+:
+/
+/
+bugzilla
+.
+mozilla
+.
+org
+/
+show_bug
+.
+cgi
+?
+id
+=
+1452528
+.
+(
+Chrome
+can
+'
+t
+pass
+/
+/
+the
+tests
+either
+way
+.
+)
+const
+message
+=
+get_message_from_worker
+(
+w
+)
+;
+const
+data2
+=
+await
+message
+;
+assert_equals
+(
+data2
+expected_subresource_message
+)
+;
+}
+description
+)
+;
+}
+worker_redirect_test
+(
+build_worker_url
+(
+'
+network
+'
+'
+scope2
+'
+)
+'
+the
+shared
+worker
+script
+was
+served
+from
+network
+'
+'
+fetch
+(
+)
+:
+sw1
+saw
+the
+fetch
+from
+the
+worker
+'
+'
+request
+to
+sw1
+scope
+gets
+network
+redirect
+to
+sw2
+scope
+'
+)
+;
+worker_redirect_test
+(
+build_worker_url
+(
+'
+network
+'
+'
+out
+-
+scope
+'
+)
+'
+the
+shared
+worker
+script
+was
+served
+from
+network
+'
+'
+fetch
+(
+)
+:
+sw1
+saw
+the
+fetch
+from
+the
+worker
+'
+'
+request
+to
+sw1
+scope
+gets
+network
+redirect
+to
+out
+-
+of
+-
+scope
+'
+)
+;
+worker_redirect_test
+(
+build_worker_url
+(
+'
+serviceworker
+'
+'
+scope2
+'
+)
+'
+sw2
+saw
+the
+request
+for
+the
+worker
+script
+'
+'
+fetch
+(
+)
+:
+sw2
+saw
+the
+fetch
+from
+the
+worker
+'
+'
+request
+to
+sw1
+scope
+gets
+service
+-
+worker
+redirect
+to
+sw2
+scope
+'
+)
+;
+worker_redirect_test
+(
+build_worker_url
+(
+'
+serviceworker
+'
+'
+out
+-
+scope
+'
+)
+'
+the
+shared
+worker
+script
+was
+served
+from
+network
+'
+'
+fetch
+(
+)
+:
+sw1
+saw
+the
+fetch
+from
+the
+worker
+'
+'
+request
+to
+sw1
+scope
+gets
+service
+-
+worker
+redirect
+to
+out
+-
+of
+-
+scope
+'
+)
+;
+<
+/
+script
+>
+<
+/
+body
+>