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constant crash on startup

  • 4 replies
  • 1 has this problem
  • 31 views
  • Last reply by krstone1

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Have used FF for years. Best and fastest browser on my Mac. Now it suddenly started crashing on every start. I can't even navigate anything within the app. It is unresponsive from the start. Always have to force quit.

I deleted the app and system files (Library - App Support - FF folder). Restarted computer and did a fresh install. Same thing.

Mac Big Sur v11.4

FF v90.0

thanks so much Ken

All Replies (4)

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If you can't get Firefox to open, you will have to do this the hard way. https://support.mozilla.org/en-US/kb/mozillacrashreporter

Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted Win 10: Press <Windows> + R on the keyboard. A Run dialog will open. In the Run dialog, type %APPDATA%\Mozilla\Firefox\Crash Reports\submitted <Enter>


Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the most Recent 5-7 File Names in the folder. Press the Reply button. Now go to the reply box and paste them in.

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Before seeing this reply I downgraded to prior version (89.0.2 for Mac). Works fine so I will stay with it for a while.

Thanks Ken

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Please post the crash reports anyway. Others might also have the issue.

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I would but I deleted the Firefox folder in Library --> App Support before installing the version I am now using so I do not have it to send.