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20.0.1: File==>New Window & New Private Window will not open then Firefox will not stop running when application is closed

  • 2 replies
  • 1 has this problem
  • 790 views
  • Last reply by cmrkboh

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Although nothing appears to be happening when clicking on either New Window or New Private Window there seems to be processes started because when I try to close Firefox and reopen, I get an error message saying that Firefox is already running. My only option then is to stop the processes via Task Manager. I have tried (several times) to uninstall and reinstall.

Chosen solution

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.

Create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.

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Chosen Solution

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.

Create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.

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Although advised not to, I finally hit the reset button in the Save Mode Window. This corrected the problem. I suspect a faulty add-on - I try and reject many. I will add them back on at a time as I develop the need. Thanks for you help.