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Unable to launch Firefox on Windows 11

Marco6921 Posted messages 4 Registration date   Status Member Last intervention   -  
fabul Posted messages 42224 Registration date   Status Moderator Last intervention   -

Hello,

For a month now, I have been unable to launch Firefox; when I double-click, a page appears for half a second and then disappears. The same happens in safe mode; I can't access the profiles.

I have done a deep uninstallation with resetbrowser

Revouninstaller

Malware scan with reanimatir

I disabled my Windows antivirus...

Nothing works...

Thank you!


10 answers

  1.
    kaneagle Posted messages 86296 Registration date   Status Moderator Last intervention   14 689
     

    Hello,

     I did a deep uninstall

    Try the procedure proposed below:

    Run Revo Uninstaller as administrator
    Uninstall Mozilla Firefox
    For the residual scan, check --> advanced mode
    Delete the leftover folders and keys.
    Restart the PC.

    ---------------------------------------------------------------------------------------------------------------
     
    Press Windows + R
    Type --> control panel and OK
     
    File Explorer options
    Tab --> View
    1- Check --> show hidden files, folders, and drives
    2- Apply
    3- OK.

    ------------------------------------------------------------------------------------------------------------
     
    Go delete the mozilla and mozilla firefox folder in these 3 directories:
    Press Windows + E
    --> C:\users\your username\AppData\Roaming
    --> C:\users\your username\AppData\Local
    --> C:\Program Files
     
    Delete the Firefox shortcuts on the desktop.
     
    Reinstall --> Firefox

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  2. Marco6921 Posted messages 4 Registration date   Status Member Last intervention  
     

    Unfortunately, this changes nothing...

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  3. kaneagle Posted messages 86296 Registration date   Status Moderator Last intervention   14 689
     

    What does it give with another browser, such as Edge, etc...?

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  4. fabul Posted messages 42224 Registration date   Status Moderator Last intervention   6 078
     

    Hello to you,

    Do you have version 24H2 of Windows 11?

    WINVER can tell you.

    If so, to check that the system or system files are not corrupted,

    Right-click on the start button, use this command with Windows PowerShell (Admin) (Or Terminal (Admin))

    CHKDSK /F C:

    Respond Y for Yes to then restart Windows.

    Then

    Dism /Online /Cleanup-Image /RestoreHealth

    Then

    sfc /scannow 

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  6. Marco6921 Posted messages 4 Registration date   Status Member Last intervention  
     

    Edge works correctly as well as Opera.

    I am on 23H2, I have still followed the steps. It doesn't change anything. Firefox launches, stays open for half a second and then nothing...

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  7. fabul Posted messages 42224 Registration date   Status Moderator Last intervention   6 078
     

    If your PC is compatible,

    To update to 24H2, use the Windows 11 ISO file which can be downloaded here:

    https://www.microsoft.com/fr-fr/software-download/windows11

    When you have the ISO file, right-click > Open with > Windows Explorer

    Then click on the setup.exe file in the folder.

    Follow the instructions to "install" without deleting everything, make sure the green check marks indicating you are keeping everything are okay.

    The 25H2 will be released soon.

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  8. Marco6921 Posted messages 4 Registration date   Status Member Last intervention  
     

    Okay, I'll do that in a week

    Thank you

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  9. marco692
     

    Re hello

    I installed the 24H2, tried everything, after the scannow, Firefox and Chrome launch, work for 30 seconds and then crash. And when I launch them, a window opens for half a second and then closes....

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  10. kaneagle Posted messages 86296 Registration date   Status Moderator Last intervention   14 689
     

    Suggestion: Maybe format and do a clean reinstallation of Windows 11?

    Tutorial --> How to install Windows 11 

    It's up to you to make this decision.

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  11. fabul Posted messages 42224 Registration date   Status Moderator Last intervention   6 078
     

    Hello again,

    Try again with Reset Browser, but be careful, sometimes it deletes bookmarks.

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