Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

I have downloaded Firefox but it will not open. I have tried several times to install and then uninstall, but it still does not work.

  • 3 replies
  • 2 have this problem
  • 4 views
  • Paskiausią atsakymą parašė FredMcD

more options

We used to use Firefox..but for whatever reason it stopped opening. We uninstalled it and we found that the old version of Firefox would open but it would straight away update to the new version and then the problems would begin again and it would not open.

We used to use Firefox..but for whatever reason it stopped opening. We uninstalled it and we found that the old version of Firefox would open but it would straight away update to the new version and then the problems would begin again and it would not open.

Chosen solution

Using another browser, download the FULL installer from Download Firefox Full Installer For All languages And Systems {web link} Save the file. Then;

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.

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

Now run the full installer.

Skaityti atsakymą kartu su kontekstu 👍 1

All Replies (3)

more options

Chosen Solution

Using another browser, download the FULL installer from Download Firefox Full Installer For All languages And Systems {web link} Save the file. Then;

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.

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

Now run the full installer.

more options

Great it worked! Thank you very much!

helenwilb said

We used to use Firefox..but for whatever reason it stopped opening. We uninstalled it and we found that the old version of Firefox would open but it would straight away update to the new version and then the problems would begin again and it would not open.
more options

Great to hear. Now open the Programs folder and remove the OLD folders. Good Luck.