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.

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

why are mltiple versions running simultaneously?

  • 2 replies
  • 2 have this problem
  • 5 views
  • Last reply by cor-el

more options

When I open Firefox I often get a message advising me that I'm running low on memory and asks me to close firefox. On checking in Task Manager I found multiple versions running simultaneously. It used to be 5, now it's 6 versions.

When I open Firefox I often get a message advising me that I'm running low on memory and asks me to close firefox. On checking in Task Manager I found multiple versions running simultaneously. It used to be 5, now it's 6 versions.

All Replies (2)

more options

I have that as well but I think your is more closely related to RAM is less then what all your apps need in total and is causing FF to say it's has low RAM. Did you make sure there isn't something else running that excessive taking RAM besides FF?

more options

You may see three or more Firefox processes running.

  • one process for the main Firefox thread (user interface)
  • one or more content processes
  • one process for the compositor thread (Windows;graphics)

You can look in "Help -> Troubleshooting Information" (about:support) to see the current multi-process state.

  • "Help -> Troubleshooting Information" -> "Application Basics":
    Multiprocess Windows
    Web Content Processes

You can modify multi-process settings and set number of content processes to 1 if it is currently set to a higher value (4).

  • Options/Preferences -> General -> Performance
    remove checkmark: [ ] "Use recommended performance settings"