new file mode 100644
--- /dev/null
+++ b/browser/locales/en-US/chrome/browser/decoder.properties
@@ -0,0 +1,11 @@
+# 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/.
+
+decoder.noCodecs.button = Learn how
+decoder.noCodecs1.message = To play video, you may need to update your system preferences.
+decoder.noCodecs2.message = To play video, you may need to install Microsoft’s Media Feature Pack.
+decoder.noCodecsXP.message = To play video, you may need to enable Adobe’s Primetime Content Decryption Module.
+decoder.noCodecsLinux.message = To play video, you may need to install the required video codecs.
+
+decoder.noHWAcceleration.message = To improve video quality, you may need to install Microsoft’s Media Feature Pack.

--- a/browser/locales/jar.mn
+++ b/browser/locales/jar.mn
@@ -21,16 +21,17 @@
     locale/browser/aboutSessionRestore.dtd         (%chrome/browser/aboutSessionRestore.dtd)
     locale/browser/aboutTabCrashed.dtd             (%chrome/browser/aboutTabCrashed.dtd)
     locale/browser/syncCustomize.dtd               (%chrome/browser/syncCustomize.dtd)
     locale/browser/aboutSyncTabs.dtd               (%chrome/browser/aboutSyncTabs.dtd)
     locale/browser/browser.dtd                     (%chrome/browser/browser.dtd)
     locale/browser/baseMenuOverlay.dtd             (%chrome/browser/baseMenuOverlay.dtd)
     locale/browser/browser.properties              (%chrome/browser/browser.properties)
     locale/browser/customizableui/customizableWidgets.properties (%chrome/browser/customizableui/customizableWidgets.properties)
+    locale/browser/decoder.properties              (%chrome/browser/decoder.properties)
     locale/browser/lightweightThemes.properties    (%chrome/browser/lightweightThemes.properties)
     locale/browser/loop/loop.properties            (%chrome/browser/loop/loop.properties)
     locale/browser/newTab.dtd                      (%chrome/browser/newTab.dtd)
     locale/browser/newTab.properties               (%chrome/browser/newTab.properties)
     locale/browser/pageInfo.dtd                    (%chrome/browser/pageInfo.dtd)
     locale/browser/pageInfo.properties             (%chrome/browser/pageInfo.properties)
     locale/browser/quitDialog.properties           (%chrome/browser/quitDialog.properties)
     locale/browser/safeMode.dtd                    (%chrome/browser/safeMode.dtd)