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Cannot open tabs in the new firefox

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  • 26 have this problem
  • 12 views
  • Last reply by Moses

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I cannot open a new tab by using the ctrl+ T shortcut or if I even click on the little + sign next to currently open tabs. If I right click a link or a bookmark and select "open in new tab" it works but I cannot open a blank tab. I have tried deleting and reinstalling twice now.

I cannot open a new tab by using the ctrl+ T shortcut or if I even click on the little + sign next to currently open tabs. If I right click a link or a bookmark and select "open in new tab" it works but I cannot open a blank tab. I have tried deleting and reinstalling twice now.

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Can you try to start Firefox in Safe Mode to see if Firefox works properly with no error? You can start Firefox in Safe Mode below:

  • Windows/Mac: Go to Help > Restart with add-ons disabled
  • Linux: Run firefox -safe-mode in the Terminal/Konsole

If Firefox opens up fine with no problems, it's probably one of your extensions that's causing the issue. You can re-enable your add-ons one by one until you find the one that causes the issue upon being re-enabled.


If there's no difference, try a clean reinstall. Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

Download a fresh Firefox copy and save the file to the desktop.

Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.

  • Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.