This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Wont start - tried the standard stuff

  • 2 replies
  • 2 have this problem
  • 7 views
  • Last reply by cor-el

more options

Every time I close firefox, it no longer opens. Doesn't appear in task manager, safe mode doesn't open, nor does profile selector. Tried:

Reinstalling leaving profiles - same problem Reinstalling removing profiles (and syncing back in) - same problem about:crashes is blank, no crash reports generated or uploaded

The only solution is to install over the previous installation EVERY time I close firefox. Clearly this isn't a great solution. I have changed nothing with this configuration other than auto windows and firefox updates. No additional addons etc.

Every time I close firefox, it no longer opens. Doesn't appear in task manager, safe mode doesn't open, nor does profile selector. Tried: Reinstalling leaving profiles - same problem Reinstalling removing profiles (and syncing back in) - same problem about:crashes is blank, no crash reports generated or uploaded The only solution is to install over the previous installation EVERY time I close firefox. Clearly this isn't a great solution. I have changed nothing with this configuration other than auto windows and firefox updates. No additional addons etc.

All Replies (2)

more options

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:

Note: You might want to print these steps or view them in another browser.

  1. Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
  2. After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
  3. Delete the Firefox installation folder, which is located in one of these locations, by default:
    • Windows:
      • C:\Program Files\Mozilla Firefox
      • C:\Program Files (x86)\Mozilla Firefox
    • Mac: Delete Firefox from the Applications folder.
    • Linux: If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
  4. Now, go ahead and reinstall Firefox:
    1. Double-click the downloaded installation file and go through the steps of the installation wizard.
    2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

Please report back to see if this helped you!

more options

Which security software (firewall, anti-virus) do you have?

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.