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

Firefox won't launch

  • 1 reply
  • 1 has this problem
  • 6 views
  • Last reply by cor-el

more options

We had the internet go down today because of weather. Now, Firefox will not launch. I have tried to uninstall and re-install but it still will not launch.

We had the internet go down today because of weather. Now, Firefox will not launch. I have tried to uninstall and re-install but it still will not launch.

All Replies (1)

more options

Did you recently uninstall an application that was using Visual C+ runtime components?

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

See "Visual Studio 2015, 2017, 2019, and 2022":

You may also have to install the Visual Studio 2013 Redistributable Package. You need to reboot the computer.