My window shows up as a different language than my primary language.
I accidentally downloaded Japanese version of Firefox and I've changed to English as the primary language. But for some reason, all of the windows for "open file" "attachments" is in Japanese. I have both languages in my mac but I have my primary language as English. I made sure by going over the settings, removing Japanese, restarting and going back to Firefox to see if it fixed the issue. I also removed Japanese as an alternative language on Firefox as well but nothing seems to fix the problem.
The attachment is what I see every time whenever I open a window in Firefox. No other program has this problem. I can still use the window in Japanese but it bothers me not knowing what is causing this issue.
Opaite Mbohovái (1)
You can try "Clear the startup cache..." via the "Help -> More Troubleshooting Information" (about:support) page.
Note that you can install the en-US Firefox version and possibly install the Japanese language pack.
You can find the full installer of the current Firefox release (106.0.5) in all languages and all operating systems here: