Firefox Community Forum

I installed Firefox on my M4 Mac and it was in English, now it's in some other langue and I can't change it back. I deleted it, and reinstalled, same issue.

I cannot get it installed in English and have it remain in English. Please help.

Hello Firefox team I was recently in Greece and now some pages appear in Greek. Like "eurobox - Αναζήτηση Google" upon a search. Windows 10, 64 bit, English. Firefox 141.0, 64 bit, English. I'm a Dane living in Germany, speak Danish, English & German, my computer is English. What to do to avoid this? Thanks. /Tom Gundtofte-Bruun, tom@g-b.dk ... Tried to upload a screenshot as .doc or .pdf, but that didn't work, sorry.

Japanese characters usually do not render.

I can reproduce this issue by:

• going to the Wikipedia page for the katakana Unicode block.
• going to any YouTube comment with Japanese text.
• hovering over the screenshot of the YouTube comment so that the tooltip containing the name of the file is shown.

On YouTube the text renders only if 1.27916663885116563rem <= font-size <= 1.92083328962326036rem. Increasing `gfx.font_rendering.fontconfig.max_generic_substitutions` from 3 to 99 allows some punctuation to render and makes the text take up horizontal space. Further increase of the value to 999 causes the interpunct to render in the Wikipedia page.

I use translation A LOT. (I'm learning a foreign language.) It would help to be able to move or resize the results window. Right now, it covers the original foreign language text. I want to compare the translation with the original text and the fixed size and position of your results window makes that a lot more difficult.

Every time I open a new site or webpage, the automatic translation window pops up. I don't need translations and I have to choose "don't translate this page" again and again. I've searched everywhere on Firefox and I can't find a way to stop this. It is extremely intrusive and annoying. I don't understand why Firefox should decide for me what I want and what I don't want. Has anybody solved this problem.

Since April 5th I have lost spell check in the message pane of the emails I type on outlook.live.com It still works in the subject line, but not the message area.

Windows 10 pro 22H2 updated to end of March, when spell check was still working well. Firefox 137.1 English Canada Language selected (has worked well for years)

I go to outlook.live.com to read and answer my @hotmail.com emails.

When right clicking on a misspelled word in the message area I get only these options, Firefox does not give me the usual options.

I am currently having other problems on that site, clearing outlook.live.com cookies does not clear the problems.

Fix for RangeError: invalid language tag and client-side exceptions in Firefox on Linux

Hi everyone, I was experiencing persistent JavaScript errors in Firefox on Linux when loading certain modern websites (e.g., built with React or Next.js). The browser console showed messages like:

   RangeError: invalid language tag: "chrome://global/locale/intl.properties"

   A client-side exception has occurred (see the browser console for more information)
   React error #418 with minified stack traces

This happened even in Safe Mode, with all extensions disabled, cookies/cache cleared, and Enhanced Tracking Protection off. ✅ Root cause and fix:

Turns out the issue was related to missing or broken locale configuration in Firefox. To fix it:

   Open about:config

   Create a new string entry:

       Name: intl.locale.requested

       Value: en-US (or fr, en-GB, etc. — any valid locale)

   Restart Firefox

After adding this key, all affected pages started working correctly. The invalid "chrome://global/locale/intl.properties" error in intl.accept_languages disappeared as well — it seems that was just a side effect of the missing locale setting. 🔁 Summary:

If you’re seeing RangeError: invalid language tag and React crashes, try adding intl.locale.requested manually. This fixed the issue entirely for me on Linux.

Hope this helps others!

Please,

I have a Debian 11 VAIO laptop, with Firefox ESR 115.14.0esr 64.

I have tried the settings menus (there is nothing about translation there, not even in languages.

Tried as well the about:config (several entries).

Nothing happens, annoying auto-translation bar shows up all the time and automatically translates several languages.

Really can't stand any longer...

Please help!

Appreciate.

I have downloaded and installed the Japanese language pack. I switched to Japanese in the settings, but English words still come out. (in fact, I'm on Japan settings typing this) According to others, I've done it correctly, but no luck for me. I saw a setting that said it isn't supported on the American browser. If that's the case, I need a better browser. It works fine on my phone, which is why I am so perplexed with this. If you could offer some advice I'd appreciate it. Thanks for your time