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Firefox won't open / launch on my mac

Aspire123
Aspire123
Posted

I have a Macbook Pro I purchased new this summer (2014). I installed the latest version of Firefox in July 2014 and it worked fine for over 2 months. Suddenly, Firefox no longer opens. It flashes like it's opened a window but nothing shows. I created a new user profile and it worked fine on the new profile, and gradually Firefox is having the same problem on each user profile I create. Please help!

I am using OSX 10.9.2 In the notifications on my mac, it says I can download an update for Firefox version 32.0.3...but when I click on that notification to do so, it slides back off the screen and doesn't install.

I have a Macbook Pro I purchased new this summer (2014). I installed the latest version of Firefox in July 2014 and it worked fine for over 2 months. Suddenly, Firefox no longer opens. It flashes like it's opened a window but nothing shows. I created a new user profile and it worked fine on the new profile, and gradually Firefox is having the same problem on each user profile I create. Please help! I am using OSX 10.9.2 In the notifications on my mac, it says I can download an update for Firefox version 32.0.3...but when I click on that notification to do so, it slides back off the screen and doesn't install.

Chosen solution

Download the current full installer and save it. After, remove Firefox. Do not remove user information. After, reboot the computer. Then the full installer.

Uninstall Firefox from your computer {web link}

Download Firefox Full Installer For All languages And Systems {web link}

Read this answer in context 4
  • Question details
    Product Firefox
    Topic Fix slowness, crashing, error messages and other problems
    System Details
    • 10.9.2

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.74.9 (KHTML, like Gecko) Version/7.0.2 Safari/537.74.9

More Information

Close
fredmcd-hotmail
FredMcD
  • Top 10 Contributor
2266 solutions 30464 answers
Posted

Chosen Solution

Download the current full installer and save it. After, remove Firefox. Do not remove user information. After, reboot the computer. Then the full installer.

Uninstall Firefox from your computer {web link}

Download Firefox Full Installer For All languages And Systems {web link}

Download the current full installer and save it. After, remove Firefox. Do not remove user information. After, reboot the computer. Then the full installer. '''[https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer Uninstall Firefox from your computer]''' {web link} '''[http://www.mozilla.org/en-US/firefox/all/ Download Firefox Full Installer For All languages And Systems]''' {web link}
cor-el
cor-el
  • Top 10 Contributor
  • Moderator
14591 solutions 132319 answers
Posted

Did you install extensions in the new profile?

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

Try to disable IPv6 (check for other possible causes as well).

Did you install extensions in the new profile? ----- Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> 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 *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes ----- Try to disable IPv6 (check for other possible causes as well). *http://kb.mozillazine.org/Error_loading_websites
Aspire123
Aspire123
Posted

Question owner

I tried starting in safe mode by holding down the option key, and it still won't launch.

I tried starting in safe mode by holding down the option key, and it still won't launch.
fredmcd-hotmail
FredMcD
  • Top 10 Contributor
2266 solutions 30464 answers
Posted

Start your Computer in safe mode. Then start Firefox. Try Safe web sites.

Starting The Computer In Safe Mode;

If running, turn your computer off. Remove any disks and thumb drives that are in your hard drives or ports. Now start your computer but also;

Windows; Press the <F8> key repeatedly. Mac: Hold down the Shift key. Linux; Using the command line, Linux/Unix computers can be booted into various run levels that determine which resources are loaded. For example, "runlevel 1" is typically the equivalent to Windows and Mac safe modes.

When the Boot menu is displayed, release the key you were pressing. You must now choose what mode you want. The most used are;

  • Safe Mode; The computer runs with only a minimum set of programs.
  • Safe Mode With Networking; Same as above, but with internet access.
Start your '''Computer''' in safe mode. Then start Firefox. Try '''Safe''' web sites. Starting The Computer In Safe Mode; If running, turn your computer off. Remove any disks and thumb drives that are in your hard drives or ports. Now start your computer but also; '''Windows; '''Press the <F8> key repeatedly. '''Mac: '''Hold down the Shift key. '''Linux; '''Using the command line, Linux/Unix computers can be booted into various run levels that determine which resources are loaded. For example, "runlevel 1" is typically the equivalent to Windows and Mac safe modes. * Source; '''[http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Safe Mode; Free Online Encyclopedia]''' When the '''Boot''' menu is displayed, release the key you were pressing. You must now choose what mode you want. The most used are; * Safe Mode; The computer runs with only a minimum set of programs. * Safe Mode '''With '''Networking; Same as above, but with internet access.