diff --git a/doc/dev-guide-source/addon-development/firefox-compatibility.md b/doc/dev-guide-source/addon-development/firefox-compatibility.md
index 64875a39f..8d537dcf5 100644
--- a/doc/dev-guide-source/addon-development/firefox-compatibility.md
+++ b/doc/dev-guide-source/addon-development/firefox-compatibility.md
@@ -1,3 +1,6 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 # Firefox Compatibility #
 
diff --git a/doc/dev-guide-source/addon-development/implementing-simple-addon.md b/doc/dev-guide-source/addon-development/implementing-simple-addon.md
index a4808d2b7..326173c96 100644
--- a/doc/dev-guide-source/addon-development/implementing-simple-addon.md
+++ b/doc/dev-guide-source/addon-development/implementing-simple-addon.md
@@ -1,3 +1,7 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
 # Implementing a Simple Add-on #
 
 This section of the tutorial takes you through the process of implementing,
diff --git a/doc/dev-guide-source/addon-development/mobile.md b/doc/dev-guide-source/addon-development/mobile.md
index 79abfcd80..a70745417 100644
--- a/doc/dev-guide-source/addon-development/mobile.md
+++ b/doc/dev-guide-source/addon-development/mobile.md
@@ -1,3 +1,7 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
 <div class="warning">Developing add-ons for Firefox Mobile is still
 an experimental feature of the SDK. Although the SDK modules used are
 stable, the setup instructions and cfx commands are likely to change.
diff --git a/doc/dev-guide-source/addon-development/package-spec.md b/doc/dev-guide-source/addon-development/package-spec.md
index 2ab217fbb..764725914 100644
--- a/doc/dev-guide-source/addon-development/package-spec.md
+++ b/doc/dev-guide-source/addon-development/package-spec.md
@@ -1,3 +1,7 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
 # Package Specification #
 
 A *package* is a directory that, at minimum, contains a JSON file
diff --git a/doc/static-files/css/footer.css b/doc/static-files/css/footer.css
index 65d220ce6..838783a4c 100644
--- a/doc/static-files/css/footer.css
+++ b/doc/static-files/css/footer.css
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 #footer {
   clear: both;
   color: #476fbe;
diff --git a/doc/static-files/css/sdk-docs.css b/doc/static-files/css/sdk-docs.css
index c9ab306ad..d768902f0 100644
--- a/doc/static-files/css/sdk-docs.css
+++ b/doc/static-files/css/sdk-docs.css
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 html, body {
   min-width: 570px;         /* 2 x sidebar fullwidth + main-content padding */
   height: 100%;
diff --git a/examples/library-detector/README.md b/examples/library-detector/README.md
index e222fdc4b..72285ac65 100755
--- a/examples/library-detector/README.md
+++ b/examples/library-detector/README.md
@@ -1,3 +1,7 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
 This is a port to the SDK of the
 [Library Detector add-on](https://addons.mozilla.org/en-US/firefox/addon/library-detector/).
 The original Library Detector is written by
diff --git a/packages/addon-kit/docs/widget.md b/packages/addon-kit/docs/widget.md
index 8c0fb47ce..dc9313451 100644
--- a/packages/addon-kit/docs/widget.md
+++ b/packages/addon-kit/docs/widget.md
@@ -1,3 +1,7 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
 <!-- contributed by Dietrich Ayala [dietrich@mozilla.com]  -->
 <!-- contributed by Drew Willcoxon [adw@mozilla.com]  -->
 <!-- edited by Noelle Murata [fiveinchpixie@gmail.com]  -->
diff --git a/packages/api-utils/data/worker.js b/packages/api-utils/data/worker.js
index 41f9890ce..aba594d4a 100644
--- a/packages/api-utils/data/worker.js
+++ b/packages/api-utils/data/worker.js
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 const ContentWorker = Object.freeze({
   // TODO: Bug 727854 Use same implementation than common JS modules,
   // i.e. EventEmitter module
diff --git a/packages/api-utils/tests/test-uuid.js b/packages/api-utils/tests/test-uuid.js
index a9ceb0fc5..56700231e 100644
--- a/packages/api-utils/tests/test-uuid.js
+++ b/packages/api-utils/tests/test-uuid.js
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 "use strict";
 
 const { uuid } = require('api-utils/uuid');
diff --git a/python-lib/cuddlefish/docs/__init__.py b/python-lib/cuddlefish/docs/__init__.py
index e69de29bb..5501cd4b3 100644
--- a/python-lib/cuddlefish/docs/__init__.py
+++ b/python-lib/cuddlefish/docs/__init__.py
@@ -0,0 +1,4 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
diff --git a/python-lib/cuddlefish/docs/webdocs.py b/python-lib/cuddlefish/docs/webdocs.py
index 11a10a7b3..72f50be53 100644
--- a/python-lib/cuddlefish/docs/webdocs.py
+++ b/python-lib/cuddlefish/docs/webdocs.py
@@ -1,3 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 import os, re, errno
 import markdown
 import cgi
diff --git a/python-lib/cuddlefish/packaging.py b/python-lib/cuddlefish/packaging.py
index 3137dc733..8f4c40ad1 100644
--- a/python-lib/cuddlefish/packaging.py
+++ b/python-lib/cuddlefish/packaging.py
@@ -1,3 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 import os
 import sys
 import re
diff --git a/python-lib/cuddlefish/templates.py b/python-lib/cuddlefish/templates.py
index 2c34cf626..a04bb9a08 100644
--- a/python-lib/cuddlefish/templates.py
+++ b/python-lib/cuddlefish/templates.py
@@ -1,3 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 #Template used by main.js
 MAIN_JS = '''\
 const widgets = require("widget");
diff --git a/python-lib/cuddlefish/tests/bug-588119-files/packages/explicit-icon/lib/main.js b/python-lib/cuddlefish/tests/bug-588119-files/packages/explicit-icon/lib/main.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/bug-588119-files/packages/explicit-icon/lib/main.js
+++ b/python-lib/cuddlefish/tests/bug-588119-files/packages/explicit-icon/lib/main.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/bug-588119-files/packages/implicit-icon/lib/main.js b/python-lib/cuddlefish/tests/bug-588119-files/packages/implicit-icon/lib/main.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/bug-588119-files/packages/implicit-icon/lib/main.js
+++ b/python-lib/cuddlefish/tests/bug-588119-files/packages/implicit-icon/lib/main.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/bug-588119-files/packages/no-icon/lib/main.js b/python-lib/cuddlefish/tests/bug-588119-files/packages/no-icon/lib/main.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/bug-588119-files/packages/no-icon/lib/main.js
+++ b/python-lib/cuddlefish/tests/bug-588119-files/packages/no-icon/lib/main.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/bug-588661-files/packages/bar/lib/bar-loader.js b/python-lib/cuddlefish/tests/bug-588661-files/packages/bar/lib/bar-loader.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/bug-588661-files/packages/bar/lib/bar-loader.js
+++ b/python-lib/cuddlefish/tests/bug-588661-files/packages/bar/lib/bar-loader.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/bug-588661-files/packages/foo/lib/foo-loader.js b/python-lib/cuddlefish/tests/bug-588661-files/packages/foo/lib/foo-loader.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/bug-588661-files/packages/foo/lib/foo-loader.js
+++ b/python-lib/cuddlefish/tests/bug-588661-files/packages/foo/lib/foo-loader.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/linker-files/three/tests/nontest.js b/python-lib/cuddlefish/tests/linker-files/three/tests/nontest.js
index 48630b0fb..edbc08ef2 100644
--- a/python-lib/cuddlefish/tests/linker-files/three/tests/nontest.js
+++ b/python-lib/cuddlefish/tests/linker-files/three/tests/nontest.js
@@ -1 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 // dummy
diff --git a/python-lib/cuddlefish/tests/linker-files/three/tests/test-one.js b/python-lib/cuddlefish/tests/linker-files/three/tests/test-one.js
index 48630b0fb..edbc08ef2 100644
--- a/python-lib/cuddlefish/tests/linker-files/three/tests/test-one.js
+++ b/python-lib/cuddlefish/tests/linker-files/three/tests/test-one.js
@@ -1 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 // dummy
diff --git a/python-lib/cuddlefish/tests/linker-files/three/tests/test-two.js b/python-lib/cuddlefish/tests/linker-files/three/tests/test-two.js
index 48630b0fb..edbc08ef2 100644
--- a/python-lib/cuddlefish/tests/linker-files/three/tests/test-two.js
+++ b/python-lib/cuddlefish/tests/linker-files/three/tests/test-two.js
@@ -1 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 // dummy
diff --git a/python-lib/cuddlefish/tests/preferences-files/packages/no-prefs/lib/main.js b/python-lib/cuddlefish/tests/preferences-files/packages/no-prefs/lib/main.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/preferences-files/packages/no-prefs/lib/main.js
+++ b/python-lib/cuddlefish/tests/preferences-files/packages/no-prefs/lib/main.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
diff --git a/python-lib/cuddlefish/tests/preferences-files/packages/simple-prefs/lib/main.js b/python-lib/cuddlefish/tests/preferences-files/packages/simple-prefs/lib/main.js
index e69de29bb..b7e0a1d5e 100644
--- a/python-lib/cuddlefish/tests/preferences-files/packages/simple-prefs/lib/main.js
+++ b/python-lib/cuddlefish/tests/preferences-files/packages/simple-prefs/lib/main.js
@@ -0,0 +1,4 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+