Hello,

Try Firefox Troubleshoot Mode to see if the problem goes away. Firefox Troubleshoot Mode (previously known as Firefox Safe Mode) is a special diagnostic mode that temporarily turns off hardware acceleration, disables add-ons (extensions and themes) and resets some settings. See the Diagnose Firefox issues using Troubleshoot Mode article for details.

If Firefox is open, you can restart in Firefox Troubleshoot Mode from the Help menu:

• Click the menu button , click Help, select Troubleshoot Mode and click Restart in the "Restart Firefox in Troubleshoot Mode?" dialog that opens.

If Firefox is not running, you can start Firefox in Troubleshoot Mode as follows:

• On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac: Hold the option key while starting Firefox.
• On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
  (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

When the Firefox Troubleshoot Mode window appears, select "Open".

If the issue is not present in Firefox Troubleshoot Mode, your problem is probably caused by an extension, theme or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Troubleshoot Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again. (If you can't exit Firefox Troubleshoot Mode, please see Firefox is stuck in Troubleshoot Mode).

When you figure out what's causing your issues, please let us know. It might help others with the same problem.

Hello,

Troubleshoot mode also not starting. Also there is no sign of starting.

Hello, Troubleshoot mode also not starting. Also there is no sign of starting.

Hey, Can you confirm that any error message appears? Does a line with firefox appears in the task Manager ? (CTRL+Shift+Echap)

I understand you tried uninstalling and reinstalling, but have you tried to delete the firefox install folder manually?

1. Delete the Firefox installation folder, which is located in one of these locations, by default:

       Windows:

C:\Program Files\Mozilla Firefox C:\Program Files (x86)\Mozilla Firefox

1. Reinstall firefox from http://www.mozilla.org/en-US/firefox/all/

Keep me informed. :)

Hi,

Nothing happened. I have mentioned earlier I used uninstall tool to clean any installation related to Firefox including registry and traces but no luck.

No evidence of running Firefox in Task manager and Resource monitor.

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":

• https://docs.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist
• https://aka.ms/vs/17/release/vc_redist.x64.exe
• https://aka.ms/vs/17/release/vc_redist.x86.exe

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

• https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems

Hi cor-el,

Firefox started working after Visual C++ components installed. And this happened after March windows cumulative updates applied.

Thanks for the support. And sorry I wrongly chosen not helpful.

Hi cor-el,

Same problem again started. I have tried reinstall and repair option of C++ and Firefox again. No luck.

Try to start Firefox in Troubleshoot Mode to see if that works.

• Windows: hold down the Shift key while starting Firefox
• Mac: hold down the Options key while starting Firefox

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode

Hi cor-el,

No luck for trouble shoot mode. Reinstalled C++ multiple times none is working.

Hi cor-el,

I have uninstalled all C++ now its started working.