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Firefox UI language

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I use Firefox in French... but lately, the contextual menu when right-clicking on a web page shows in English. The contextual menu when right-clicking on the Menu bar or Bookmarks toolbar, is partly in French, but with a section in English (the Menu bar)... sometimes, the Menu bar switches to English (I can't seem to isolate what makes it switch or switch back). Other menus show in French and setting for language is set to French.

Is there something I can do to fix this?

Firefox 124.0.1 (64 bits) on Windows 11

I use Firefox in French... but lately, the contextual menu when right-clicking on a web page shows in English. The contextual menu when right-clicking on the Menu bar or Bookmarks toolbar, is partly in French, but with a section in English (the Menu bar)... sometimes, the Menu bar switches to English (I can't seem to isolate what makes it switch or switch back). Other menus show in French and setting for language is set to French. Is there something I can do to fix this? Firefox 124.0.1 (64 bits) on Windows 11

Chosen solution

You can try "Clear the startup cache..." via the "Help -> More Troubleshooting Information" (about:support) page.

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Seçilmiş Həll

You can try "Clear the startup cache..." via the "Help -> More Troubleshooting Information" (about:support) page.

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Thank you so much. It worked.