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Suddenly, I cannot load my firefox 54.0.1 on my macbook pro OS 10.10.5. But, I can load safari.

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My wifi is working on all devices. My firefox 54.0.1 on my macbook pro OS 10.12.6 is working perfectly, but I can't get firefox to load on my primary macbook pro with a lower OS. I've added firefox to my firewall, but it didn't help. Appreciate your help with this. Thank you! Lyndaa

My wifi is working on all devices. My firefox 54.0.1 on my macbook pro OS 10.12.6 is working perfectly, but I can't get firefox to load on my primary macbook pro with a lower OS. I've added firefox to my firewall, but it didn't help. Appreciate your help with this. Thank you! Lyndaa
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Additional System Details

Installed Plug-ins

  • Shockwave Flash 26.0 r0

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0

More Information

mattcamp 42 solutions 335 answers

Upgrading to macOS seems me the easiest solution in this case.

Maybe the new functionalities of the current version aren't supported by Yosemite.

Upgrading to macOS seems me the easiest solution in this case. Maybe the new functionalities of the current version aren't supported by Yosemite.

Modified by mattcamp

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cor-el
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15577 solutions 141049 answers

Firefox should work on OS X 10.10 (10.9+).

Try to start Firefox in Safe Mode to see whether that works.

  • Windows: hold down the Shift key while starting Firefox
  • Mac: hold down the Options key while starting Firefox

You can create a new profile to test if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

Firefox should work on OS X 10.10 (10.9+). Try to start Firefox in <u>Safe Mode</u> to see whether that works. *Windows: hold down the Shift key while starting Firefox *Mac: hold down the Options key while starting Firefox You can create a new profile to test if your current profile is causing the problem. See "Creating a profile": *https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles *http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems. *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
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Question owner

mattcamp said

Upgrading to macOS seems me the easiest solution in this case. Maybe the new functionalities of the current version aren't supported by Yosemite.
''mattcamp [[#answer-995991|said]]'' <blockquote> Upgrading to macOS seems me the easiest solution in this case. Maybe the new functionalities of the current version aren't supported by Yosemite. </blockquote>
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Question owner

Thanks for your suggestions. Changing my Firefox profile sounds like a good possibility! However, I spoke to apple before I saw your comment, and at their suggestion, I updated to Sierra. Unfortunately, when the update was completed, I discovered that all my documents were missing other than those on my desktop. I've spent the past two hours with a supervisor, and we've tried reinstalling Sierra. It didn't work. She's taken a break and will call me back at 5:15. I'd appreciate any new comments that might help. Thank you so much!!!

Thanks for your suggestions. Changing my Firefox profile sounds like a good possibility! However, I spoke to apple before I saw your comment, and at their suggestion, I updated to Sierra. Unfortunately, when the update was completed, I discovered that all my documents were missing other than those on my desktop. I've spent the past two hours with a supervisor, and we've tried reinstalling Sierra. It didn't work. She's taken a break and will call me back at 5:15. I'd appreciate any new comments that might help. Thank you so much!!!
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