sorry for double post not sure why it did it

this one has a screenshot as you can see

Hi, this is Multiprocess which is normal, but if you are having slowness/hanging issues, try reducing the number of multiprocesses: Go to Options > General - Performance, then deselect 'Use recommended performance settings' and change 'Content process limit' to a smaller number - try 1. See - Firefox's performance settings, and Startup, home page, tabs, and download settings.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you!

Scribe said

Hi, this is Multiprocess which is normal, but if you are having slowness/hanging issues, try reducing the number of multiprocesses: Go to Options > General - Performance, then deselect 'Use recommended performance settings' and change 'Content process limit' to a smaller number - try 1. See - Firefox's performance settings, and Startup, home page, tabs, and download settings.'

Awesome thanks for the help that solved my problems :)

There option to limit one process does not work with the new Firefox Quantum so you will have to use and older version of Firefox and then it may actually work.

This does not work in the newest version of Firefox and will NOT run only one process. I am a 35 year computer tech with a LOT of experience. Firefox will need to patch the new Firefox Quantum to allow this option to work.

cant delete this comment so wrote this

"Hi, this is Multiprocess which is normal,"

why is this normal? what is Multiprocess?

_DRP said

"Hi, this is Multiprocess which is normal," why is this normal? what is Multiprocess?

I Second this excellent question Why is this 'Normal' I am watching 6 processes taking over 3% and over 400Mb memory of a fast Win10 i5 system just posting this reply!? This does warrant explanation

You may see three or more Firefox processes running.

• one process for the main Firefox thread (user interface)
• one or more content processes set via dom.ipc.processCount
  Options/Preferences -> General -> Performance
  remove checkmark: [ ] "Use recommended performance settings"
• 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

See also:

• https://www.ghacks.net/2016/07/22/multi-process-firefox/
• https://www.ghacks.net/2016/11/11/firefox-52-nightly-quantum-compositor-has-landed/
• https://hacks.mozilla.org/2017/04/firefox-53-quantum-compositor-compact-themes-css-masks-and-more/

cor-el said

You may see three or more Firefox processes running.

• one process for the main Firefox thread (user interface)
• one or more content processes set via dom.ipc.processCount
  Options/Preferences -> General -> Performance
  remove checkmark: [ ] "Use recommended performance settings"
• 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

See also:

• https://www.ghacks.net/2016/07/22/multi-process-firefox/
• https://www.ghacks.net/2016/11/11/firefox-52-nightly-quantum-compositor-has-landed/
• https://hacks.mozilla.org/2017/04/firefox-53-quantum-compositor-compact-themes-css-masks-and-more/

Thanks for your reply ghacks was most informative and I'm not going to get stressed seeing Firefox at the top of Task Manager having followed your links Your reply is very much appreciated Regards TW