1777658 - Language changes from language packs are not properly applied without restarting the browser

Status: NEW

(Toolkit :: Add-ons Manager, defect, P3)

Description

[Alex Cornestean]

Attachment: 2022-07-01_09h58_47.mp4

Affected versions:
Beta: 103.0b3/20220630185738
Release: 102.0/20220623063721

Steps to reproduce:

1. Access https://addons.mozilla.org/en-US/firefox/language-tools/
2. Install a language pack, for example the German (Deutsch) language pack
3. Access about:preferences#general, scroll down to the “Language” section and from the drop down select “Deutsch”. The language pack will be applied as it can be seen from the interface changing from English to German
   NOTE: Do not restart the browser
4. Go to Add-ons Manager and from either the “Recommended” or “Extensions” tabs, install one of the recommended add-ons.
5. Notice the initial add-on download doorhanger is still in English.
6. Click on the equivalent in German “Add” button to install the add-on
7. Notice the doorhanger that is displayed after the add-on has been installed contains a couple of words in English, along the lines of “Addon_Name was added”, while the rest of the strings are in German.
8. Remove the add-on installed at step 4.
9. Notice the add-on removal pop-up has the button strings in English.
10. Restart the browser
11. Go to Add-ons Manager and from either the “Recommended” or “Extensions” tabs, install one of the recommended add-ons.
12. Notice the download doorhanger is now in German and all subsequent displayed doorhangers are fully in German
13. Remove the add-on installed at step 10
14. Notice the add-on removal pop-up is fully in German

Actual:
Language packs are not fully/properly applied without restarting the browser.

Expected:

1. Language packs should be fully/properly applied without restarting the browser
   OR
2. A notification should be displayed at the “Language” section of about:preferences#general, prompting the user to restart the browser in order to fully apply the language pack

NOTE:
Also notice that without a browser restart the descriptions on the add-on cards from Add-ons Manager are still in English, which might be a possible additional cause for the issue occurring.

Comment 1

[Tomislav Jovanovic :zombie]

Basically we may need an extension API for this.

Comment 2

[Rob Wu [:robwu]]

(In reply to Alex Cornestean from comment #0)

NOTE:
Also notice that without a browser restart the descriptions on the add-on cards from Add-ons Manager are still in English, which might be a possible additional cause for the issue occurring.

Could be bug 1765023

Comment 3

[Shane Caraveo (:mixedpuppy)]

Bug 1765023 is unrelated.

This bug is probably due to some text translations that still exist in properties files rather than fluent.