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.

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.

the app doesnt open

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

Marwan
Marwan
more options

the app doesnt open at all it just flickers a white screen or an error box for a femto second then nothing happens tried to open in administrator mode still nothing i removed all my profiles and unistalled a lot of times but still nothing happens i try to open in troubleshoot mode but it doesnt open..

i had problems with a bios update very long ago and i am working on legacy mode rn but it didnt effect firefox then idk if it has to do anything with the problem

the app doesnt open at all it just flickers a white screen or an error box for a femto second then nothing happens tried to open in administrator mode still nothing i removed all my profiles and unistalled a lot of times but still nothing happens i try to open in troubleshoot mode but it doesnt open.. i had problems with a bios update very long ago and i am working on legacy mode rn but it didnt effect firefox then idk if it has to do anything with the problem

All Replies (4)

FredMcD
FredMcD
more options

What app? Firefox?

Did you download the installer from this link; http://www.mozilla.org/en-US/firefox/all/

Please explain the problem in detail. What happens? What is/are the exact error message(s) ?

Marwan
Marwan Question owner
more options

Yes i dowoaded the app from this link.

The problem is the app doesnt open and it doesnt even show an error, it sometimes flickers a white screen

FredMcD
FredMcD
more options

You are using Windows 10? We have been seeing this issue a lot of late;

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.

Install both 32-bit and 64-bit "Visual Studio 2015, 2017 and 2019" downloads, (x86: vc_redist.x86.exe and x64: vc_redist.x64.exe) from https://support.microsoft.com/help/2977003/the-latest-supported-visual-c-downloads

You may not need the latter (32-bit version) if you use 64-bit Firefox. You may have to reboot the computer. ++++++++++++++++++++++++++++++++++++++++++++++ In another thread, a user reported that a recent update of Malwarebytes Anti-Exploit (version 415) may be causing symptoms similar to the VC Runtime problem. If you have MBAE, it should have a setting to exempt Firefox. You could test whether that makes any difference.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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 and 2019":

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