How to disable multiple task manager processes?
I had once changed a setting which allowed FireFox to only one run process, but somethings changed and now there are about 15 firefox.exe processes running in my task manager and would like to change it back to a single process.....what setting fixes this?
Additional System Details
- User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0
Multi-process (e10s) can no longer be disabled on the "about:config" page - see :
If however, you really want to disable it, you can set an environment variable to disable multi-process. :
• set MOZ_FORCE_DISABLE_E10S=1
How to set environment variables : http://www.computerhope.com/issues/ch000549.htm
You can use the set command to create a temporary environment variable.
- open command prompt window
- change to installation directory
- type "set MOZ_FORCE_DISABLE_E10S=1" and press enter
- type "firefox.exe" and press enter
How to use set command : http://www.computerhope.com/sethlp.htm
Or you could set an environment variable in the Windows Control Panel => System.
You can create a firefox-e10s.cmd file with this content:
set MOZ_FORCE_DISABLE_E10S=1 start "" "<path_to_firefox>\firefox.exe"
• (64-bit Firefox) "C:\Program Files\Mozilla Firefox\" • (32-bit Firefox) "C:\Program Files (x86)\Mozilla Firefox\"
Modified by McCoy
so is there a reason it uses so many processes? I'm looking at 12 processes right now. if I use just one process it ends up taking up to about 4 million kb of memory, but it's using about the same or more with all the processes as well
It is quite normal to see more Firefox processes running.
- one process for the main Firefox thread (user interface)
- one or more content processes (default is 8), see:
Options/Preferences -> General -> Performance
remove checkmark: [ ] "Use recommended performance settings"
- one process for the compositor thread
- one process for the WebRender when this feature is enabled
You can find the current multi-process state on the Troubleshooting Information page (about:support).
- "Help -> Troubleshooting Information" -> "Application Basics":
See also the Remote Processes section further down for more detail.
I got a half-dozen firefox.exe processes on my laptop after updating to 68.
Is this my payback for keeping Firefox (manually) updated??
(NOT a happy camper, but at least it's still (nominally) working...)
6 processes on a single-core CPU are a bit much... esp. when you add in all the Windows disServices ;) ... I currently have 13 svchost.exe's .
But, good news... performance mysteriously improved, now 90%+ idle. (68.0.1 64-bit)
But I still have 6 firefox.exe's... mysteriously only using a total of 7% CPU... which I can live with.
Modified by Bill Mayhew
Bill Mayhew said
6 processes on a single-core CPU are a bit much... esp. when you add in all the Windows disServices ;) ... I currently have 13 svchost.exe's . But, good news... performance mysteriously improved, now 90%+ idle. (68.0.1 64-bit) But I still have 6 firefox.exe's... mysteriously only using a total of 7% CPU... which I can live with.
if you're think you've a malware running in your pc you can try to perform a scan with freeware portable tool called adwcleaner.
To disable multi processes go to `about:config?filter=browser.tabs.remote.autostart` and make sure to change the value to `false`, after you've done that, restart firefox.
^ Quote; To disable multi processes go to `about:config?filter=browser.tabs.remote.autostart` and make sure to change the value to `false`, after you've done that, restart firefox.
That is not correct. In Firefox 68 and later you can no longer disable multi-process via a pref. As posted above, you need to use an environment variable (MOZ_FORCE_DISABLE_E10S=1).
I expect a league-leading browser like Firefox to accommodate ALL its long-term users - even on low-end laptops - WITHOUT *workarounds* like environment variables. Firefox should be able to tell when it's running on single-core machines and STOP adding MULTIPLE PROCESSES to the workload,
VERY TACKY, Mozilla!!!