Windows 10: Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error

Discus and support Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error in Windows 10 Software and Apps to solve the problem; [ATTACH] Hi there I have a very annoying problem with Firefox Portable from portableapps.com. I have the latest available version as of today,... Discussion in 'Windows 10 Software and Apps' started by xprt007, Apr 6, 2021.

  1. xprt007 Win User

    Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error


    Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error 8ba1fb54-e1d2-4a79-b514-fb2e04061612?upload=true.jpg


    Hi there

    I have a very annoying problem with Firefox Portable from portableapps.com. I have the latest available version as of today, Windows 10 Home 64 bit, 8GB RAM notebook, all Windows updates installed.


    Because I had many tabs + 2, 3 windows open when I started the notebook from hibernation, it was taking a bit long for it to completely "wake up", so I decided to close Firefox, which I assume was taking most memory via Taskmanager, something I have done countless times before, on this notebook.
    Usually you see "Mozilla Firefox, Portable edition..." under "Apps" & "Background processes" in the Taskmanager. I was in a hurry and started with closing the Firefox instance I saw under Background processes, before going to quickly close the instances under Apps.


    I have never ever had a problem with closing Firefox or any process before via the task manager.

    When I tried to start Firefox shortly after that, I got the error message another instance was running & I should first close it, although there was clearly none visible in the Task manager, that I should first close!

    I also tried another instance of Firefox portable I have at another location, same problem.


    I re-started the notebook and to my surprise, I now get the error message whenever I try to start Firefox portable like I have done thousands of times before, although no one has started any instance before. This is very frustrating, since it has my bookmarks & other settings but cannot use it and no other instance or Portable firefox installed elsewhere is usable!!.

    How can I urgently resolve this?

    Was the problem closing the instance under "Background processes" before that under "Apps" in task manager which caused some corruption of what/where??, although as I have said, I have over these many years never had any issue with closing any program whatever the order in task manager.

    Thank for your quick response.

    :)
     
    xprt007, Apr 6, 2021
    #1

  2. FireFox


    Hi:

    In addition to the great advice already offered....

    ...Most problems with Firefox originate in the user's profile, not in the program itself.

    A specific suggestion for the issue you report:

    Firefox - Profile in Use

    Then, there is a logical sequence for Firefox diagnostics, which (as already suggested) generally starts with Mozilla Safe Mode (not to be confused with Windows Safe Mode):

    Firefox - Standard Diagnostic

    or
    Fix slowness, crashing, error messages and other problems


    Resetting Firefox (as already suggested) is certainly a reasonable option, but there are other, less "destructive" steps one might consider first.
    There are also more drastic steps, such as creating a new profile. This is sometimes the best way to get back up and running, if the existing profile is highly corrupted.

    Please let us know if you need more help.

    Thanks,
    MM
     
    MoxieMomma, Apr 6, 2021
    #2
  3. Firefox does not work on start up

    Hi,

    Thank you for your interest in Windows 10.

    I suggest you to uninstall and reinstall Firefox
    and check if it fixes the issue. Follow the steps below to uninstall
    Firefox:

    • Press Windows key + X.
    • Click on Programs and Features.
    • Look for Firefox and right click on it and click on
      uninstall.
    • Reboot the computer after uninstall is complete and try to reinstall them.
    Hope this information is helpful. Please do let us know if you need further assistance, we’ll be glad to assist you.
     
    Giridhar J, Apr 6, 2021
    #3
  4. Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error

    Video Issues in Windows 10 With Firefox

    Hi,

    Thank you for posting your query on Microsoft Community.

    Please provide the following information with us to understand the issue better.


    • Is the issue occurs in Microsoft Edge?

    • Let us know whether the issue is specific to online videos or it is happening with other videos present in your system too?

      As the initial troubleshooting steps, I would suggest you to check all the available Windows Updates. Installation of recent Windows Updates should fix the issue.

      If the issue still persists, then try updating the Display driver and check. Here is the steps:
    • Press Windows Key + R on your desktop screen to go to run command box.
    • Type devmgmt.msc and hit Enter.
    • In Display Adapter, expand Display Adapter, right-click , and then click
      Update.
    If the issues persists ,only with firefox then i suggest you to contact firefox support.

    Please do let us know the status of the issue to assist you further.

    Thank you.
     
    Divya Murugan, Apr 6, 2021
    #4
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Firefox Portable unusable: How to Fix the “Firefox Is Already Running” Error

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