Share via

How do I prevent Firefox from opening multiple processes in Windows 10?

Anonymous
2019-10-27T13:08:23+00:00

About half the time when I use Firefox, it opens multiple processes. These don’t show up on Task Manager; I find out only when trying to open Firefox again, having thought it was shut down.

Following posts on the Microsoft boards, I’ve set browser.tabs.remote.autostart to false; it makes no difference.

Suggestions? Thanks!

Windows for home | Windows 10 | Internet and connectivity

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

4 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2019-10-27T13:15:44+00:00

    Hi HG909, my name is Hadrien, an independent advisor and I'll do my best to help you today.

    Try this method :

    1. Open Firefox and type "about:preferences" in the navigation bar, press Enter
    2. Click on the "General" tab and scroll down until you see "Performance"
    3. Uncheck "Use recommended performance settings" and set "Content process limit" value to "1"
    4. Close Firefox, restart your computer and check if your issue persists

    Regards,

    Hadrien

    10+ people found this answer helpful.
    0 comments
  2. Anonymous
    2019-10-27T14:06:17+00:00

    Hi HG909, my name is Hadrien, an independent advisor and I'll do my best to help you today.

    Try this method :

    1. Open Firefox and type "about:preferences" in the navigation bar, press Enter
    2. Click on the "General" tab and scroll down until you see "Performance"
    3. Uncheck "Use recommended performance settings" and set "Content process limit" value to "1"
    4. Close Firefox, restart your computer and check if your issue persists

    Regards,

    Hadrien

    Hi, Hadrien,

    Many thanks for your help - - - but, alas, the fix didn't work. I'm still getting the same message: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window."

    Any other suggestions? Much appreciated!

    4 people found this answer helpful.
    0 comments
  3. Anonymous
    2019-10-27T22:18:02+00:00

    Thanks!

    2 people found this answer helpful.
    0 comments
  4. Anonymous
    2019-10-27T16:30:42+00:00

    Dear HG909,

    Check the solution posted here, it's shown in green "Chosen solution" : https://support.mozilla.org/bm/questions/124396...

    If it still doesn't help try following this guide : https://support.mozilla.org/en-US/kb/firefox-al...

    Also try the "Remove the Profile Lock" fix shown here : https://www.howtogeek.com/131004/how-to-fix-the...

    Regards,

    Hadrien

    Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

    1 person found this answer helpful.
    0 comments