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

Hi I can't uninstall my 8.66 mozilla firefox .42 even with updating to a newer version

  • 2 replies
  • 1 has this problem
  • 2 views
  • Last reply by FredMcD

more options

When I right click to uninstall nothing happens. I've tried downloading a newer version and it doesn't work either.

When I right click to uninstall nothing happens. I've tried downloading a newer version and it doesn't work either.

All Replies (2)

more options

What is this - 8.66 mozilla firefox .42?

The current release version of Firefox can be downloaded here: https://www.mozilla.org/en-US/firefox/all/

more options

Start your Computer in safe mode with networking.

Starting The Computer In Safe Mode;
Free Online Encyclopedia

Then try to uninstall.


If you are still having trouble, Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder. Linux: Check your user manual.

Do Not remove the profiles folder.

Look for, and rename any Mozilla or Firefox program folders by adding .old to them.

After rebooting the computer, run a registry scanner. If all goes well, remove the OLD folders when you are done.