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!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox won't start and tried all troubleshooting options in Windows 10 Pro (64-bit)

  • 2 replies
  • 0 have this problem
  • 1 view
  • Last reply by cor-el

jkochuba
jkochuba
more options

Firefox was running fine but few days ago, cannot get Firefox to start. Tried to uninstall, reinstall but didn't work. Tried uninstall, shutdown, reinstall and didn't work. Tried profile manager but it would not start so deleted the profile.ini file. Still won't start. When I look at Task manager, no processes for Firefox are running. Is there something else I should try to get working or should I just not use anymore?

Lenovo P52e laptop, Windows 10 Pro v22H2, 64-bit operating system Mozilla Firefox 64-bit program is being installed in Program Files directory

Firefox was running fine but few days ago, cannot get Firefox to start. Tried to uninstall, reinstall but didn't work. Tried uninstall, shutdown, reinstall and didn't work. Tried profile manager but it would not start so deleted the profile.ini file. Still won't start. When I look at Task manager, no processes for Firefox are running. Is there something else I should try to get working or should I just not use anymore? Lenovo P52e laptop, Windows 10 Pro v22H2, 64-bit operating system Mozilla Firefox 64-bit program is being installed in Program Files directory

All Replies (2)

jonzn4SUSE
jonzn4SUSE
  • Top 10 Contributor
more options

What version of Firefox and where are you getting it from?

Try this option. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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.