We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.