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Firefox crashes

  • 4 replies
  • 1 has this problem
  • Last reply by Sathington

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Firefox will not open on my Mac. It pops up once or twice then sits, nothing happens. I tried reinstalling it, but the same thing happened.

Any insight would be helpful.

Thanks, Andrew

All Replies (4)

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Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

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Yes. Same thing. Thx

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Has your problem has been resolved? If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

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Same situation. Off to a meeting. Thanks