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Firefox 54 does not work on Mac

  • 6 replies
  • 3 have this problem
  • 4 views
  • Last reply by FredMcD

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Firefox 54 does not work on my Mac Mini desktop computer with the El Capitan OS X.

When I click onto the Firefox 54 icon after installation, the Firefox menu bar at the top of the computer greys out and nothing else happens. That is, the Firefox browser does not start, nothing happens. I've installed the latest version of Firefox 54 for Mac.

Thanks for any help on fixing this problem.

Firefox 54 does not work on my Mac Mini desktop computer with the El Capitan OS X. When I click onto the Firefox 54 icon after installation, the Firefox menu bar at the top of the computer greys out and nothing else happens. That is, the Firefox browser does not start, nothing happens. I've installed the latest version of Firefox 54 for Mac. Thanks for any help on fixing this problem.

Chosen solution

Thanks for the great tips. Here's an update. Since I installed the earlier version of Firefox it has been working for me even though it updated itself to the latest version. But I'll keep these tips in mind should there be an issue in the future. Thanks for the time and information. It's much appreciated.

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All Replies (6)

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Many have reported problems with v54.

For now, consider this;

Install Older Version Of Firefox {web link} Be sure to read everything here.

If you still want to downgrade, look under; I still want to downgrade. Click the Directory of other versions and languages link. Look for the directory of the version that you want. But, remember that old versions may have security issues.

You should also check out Firefox; Extended Support Release {web link} ESR Notes System Requirements

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I installed an older version of Firefox but the browser automatically updated itself to the latest version (54.0, 64 bit). I haven't found a way to prevent Firefox from updating itself automatically.

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Type about:preferences#advanced<enter> in the address bar.

Under Advanced, Select Update. Check the settings.

After try again.

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Try to use one of these to start Firefox in Safe Mode:

  • Windows: hold down the Shift key while starting Firefox
  • Mac: hold down the Options key while starting Firefox
  • Help -> Restart with Add-ons Disabled

Can you bring up the Profile Manager and try to create a new profile?

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Chosen Solution

Thanks for the great tips. Here's an update. Since I installed the earlier version of Firefox it has been working for me even though it updated itself to the latest version. But I'll keep these tips in mind should there be an issue in the future. Thanks for the time and information. It's much appreciated.

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Keep us posted.