Windows 10 已于2025年10月14日停止支持。如果您正在使用 Windows 10,参见 这篇文章

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when I open Firefox my task manager says there is 14 of them open and it bogged down my syster so I couldn't work.

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tell me why when I start Firefox my task manager shows anywhere from 14 to 18 of Firefox running and my system is so bogged down I can't work. I've tried waiting thinking it was possibly updating but it didn't change. not a lot of sense to use a browser that eats up my time and system and won't let me work. I have run my Norton scans, and utility program, but nothing seems to help. And its not the cookies.

tell me why when I start Firefox my task manager shows anywhere from 14 to 18 of Firefox running and my system is so bogged down I can't work. I've tried waiting thinking it was possibly updating but it didn't change. not a lot of sense to use a browser that eats up my time and system and won't let me work. I have run my Norton scans, and utility program, but nothing seems to help. And its not the cookies.

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It is quite normal to see more Firefox processes running.

  • process for the main Firefox thread (user interface)
  • one or more content processes
    you see more content processes when Fission is enabled
  • process for the compositor thread
  • process for extensions
  • process for WebRender when this feature is enabled

There are several toolkit.aboutProcesses prefs on the about:config page to show more info. You can find the current multi-process state on the Troubleshooting Information page (about:support).

  • "Help -> Troubleshooting Information"
    "Application Basics":<be>Multiprocess Windows and Fission Windows
    "Remote Processes" (Web Content)

You can check the about:memory and about:processes pages for info about all processes. See also the about:unloads page for info about the tabs.

Having more content processes than in the past is because Fission is enabled by default in current releases. Fission is about a new site isolation architecture in Firefox and you will see more Firefox processes running than before.

You can find the current Fission state on the "Help -> More Troubleshooting Information" (about:support) page (search for Fission).

You can control Fission via fission.autostart on the about:config page, true to enable and false to turn it off.

  • about:config => fission.autostart = false

You can open the about:config page via the location/address bar. On the warning page, you can click "Accept the Risk and Continue" to open about:config.