Note

• Bug filled as a follow up from https://bugzilla.mozilla.org/show_bug.cgi?id=1764081#c4

Affected versions

• latest Beta 100.0b8
• latest Nightly 101.0a1

Affected platforms

• Win 11 x64
• macOS 11
• Ubuntu 18.04 x64

Steps to reproduce

1. Launch Firefox (I've used a FR locale build).
2. Navigate to about:preferences, Languages section.
3. Change the language to Deutsch.
4. Click on the App Menu an observe the translation for the "Sign in" button.
5. Navigate to any website, and click on the shield icon from URL; observe the translation for the ETP heading title.
6. Click on the AppMenu -> More tools.

Expected result

• Step 4, 5, 6: The strings are translated into german.

Actual result

• Step 4, 5, 6: The strings remained in the original language, in this case, french. They are not translated into german, as can be seen below:

• The heading title of the ETP panel https://prnt.sc/B18OPHtRkckx
• Sign in button from the AppMenu https://prnt.sc/vqkiTbK2rsh2
• AppMenu -> More tools https://prnt.sc/Zhp6yGzOK5xh

Regression range

• Not a regression.

Additional notes

• It could happen with other major languages, these have been the ones that have shown problems so far: Deutsch, Italiano, Espanol.
• Also, other areas from Firefox could be affected, we'll update the bug if that would be the case.
• The issue cannot be reproduced anymore after a browser restart.

• Also, other areas from Firefox could be affected, we'll update the bug if that would be the case.

• Bookmark panel, in the Location's drop down menu.
• Download panel, the string "Completed", after downloading a file.

Task-Manager is the correct translation for "de" - https://pontoon.mozilla.org/de/firefox/browser/browser/menubar.ftl/?search=menu-tools-task-manager&string=221193

FYI: Product and Engineering agree that this bug does not need to fixed in order for Live Language Switching to ship in Fx 100.