1734845 - No languages are available on Firefox Language Settings menu

Status: VERIFIED FIXED

(Firefox :: Settings UI, defect)

Description

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Attachment: No languages are available .gif

[Affected Versions]:

• Firefox Beta 94.0b3 (Build ID: 20211007185900)
• Firefox Release 93.0 (Build ID:20210927210923)

[Affected Platforms]:

• Windows 10 x64
• macOS 10.15.7
• Linux Mint 20

[Prerequisites]

• Have a new Firefox profile.

[Steps to reproduce]:

1. Open the latest Firefox with the profile from prerequisites.
2. Navigate to "about:preferences" page.
3. Scroll down to the "Language" section.
4. Click the "Set Alternatives..." button.
5. Click the "Select a language to add..." dropdown and select the "Search for more languages" option.
6. Observe the list.

[Expected results]:

• A list with all languages is displayed.

[Actual results]:

• Only the "Available languages" placeholder is displayed and there are no languages listed.

[Additional Notes]:

• Attached is a screen recording of the issue.

Comment 1

[Francesco Lodolo [:flod]]

[Tracking Requested - why for this release]:

I'm trying to look at the code, and I think everything is in this file, which was last touched in fx77
https://hg.mozilla.org/mozilla-central/log/tip/browser/components/preferences/dialogs/browserLanguages.js

I see the API responding with a list of language packs, e.g. for 93, so someone needs to try and dig deeper into where it fails
https://addons.mozilla.org/api/v4/addons/language-tools/?app=firefox&type=language&appversion=93.0&author=mozilla

Comment 2

[Francesco Lodolo [:flod]]

QA confirms that this is broken for 92, which was working last week.

AMO team is investigating, but seems to be caused by a code push on their side.

Comment 3

[Francesco Lodolo [:flod]]

Problem should be solved (verified on a new profile).

Existing profiles might still hit the browser's internal cache (it's set to 24h) if they searched for new languages recently.

Comment 4

[Giorgia Nichita, Release Desktop QA]

Reproduced this issue on Win 10 using an affected Beta build 94.0b3, with the steps from comment 0.
The issue is verified as fixed on latest Beta 94.0b4 and Release 93.0, across the following platforms: Win 10x64, macOS 10.15 and Ubuntu 20.04. Nightly 95 cannot be verified since this feature is disabled on Nightly builds.