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

How to disable multiprocessor support

  • 6 replies
  • 27 have this problem
  • 145 views
  • Last reply by Curtis123

more options

I use a number of WIndows 7 netbooks, with limited resources, they use Windows starter and are limited to 2gb ram. The latest update 57 with its multiprocessor architesture has made Firefox almost unusable. Is it possible to stop it running so many separate threads , presuamably thinking there are loads of processors. Ram and CPU demands are really high.

I use a number of WIndows 7 netbooks, with limited resources, they use Windows starter and are limited to 2gb ram. The latest update 57 with its multiprocessor architesture has made Firefox almost unusable. Is it possible to stop it running so many separate threads , presuamably thinking there are loads of processors. Ram and CPU demands are really high.

Chosen solution

To disable e10s/multiprocess go to about:config by typing it in your URL bar. Search for browser.tabs.remote.autostart using the search box on about:config. There may be multiple results. Set them all to false and restart the browser.

If this solved your problem, mark this reply as the solution.

Read this answer in context 👍 20

All Replies (6)

more options

Chosen Solution

To disable e10s/multiprocess go to about:config by typing it in your URL bar. Search for browser.tabs.remote.autostart using the search box on about:config. There may be multiple results. Set them all to false and restart the browser.

If this solved your problem, mark this reply as the solution.

more options

There are no entries in about:config for browser.tabs.remote.autostart

more options

If there are no entries, create it as a boolean and set it to false.

more options

Not that into this so have absoluely no idea how to do what you have suggested. Thanks, but I guess Im stuck with acute slowness.

more options

Right click >> create new boolean.

more options

Hi done that possibly slightlty quicker. Thanks