When I open up Firefox I acquire multiple firefox.exe procedures (generally 4 or 5, the number varies) showing in my task manger. I do not understand just how that occurred and the thing is it slows down my internet browser. I"m using Windows 7.

You are watching: Why are there multiple instances of firefox running

I haven"t take any type of steps to fix it.

Thanks for the aid.

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2 firefox.exe running in the background whenever I open up Firefox | Firefox Support Forum | Mozilla Support



This might suggest that your Firefox is making use of a brand-new "multiprocess" attribute.


One of the headline alters in Firefox 48+ is e10s, which sepaprices the internet browser interconfront process from the web page content procedure. The performance affect of this deserve to vary a lot in between systems: many type of users discover it quicker, some find it sreduced, for many type of it"s neutral. There more than likely is rather even more memory usage than once everything runs in a single firefox.exe process.

Are you utilizing e10s?

You have the right to examine whether you have this attribute turned on as follows. Either:

"3-bar" menu button > "?" button > Troubleshooting Information(menu bar) Assistance > Troubleshooting Informationkind or paste about:support in the address bar and press Enter

In the first table on the page, inspect the row for "Multiprocedure Windows" and check out whether the number on the left side of the fractivity is higher than zero. If so, you are making use of e10s.

If you are utilizing e10s:

If you think Firefox is not performing well or is utilizing an unreasonable amount of sources currently, you might evaluate whether e10s is bring about this trouble by turning it off as follows:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Rerevolve. Click the switch promising to be careful.

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(2) In the search box over the list, kind or paste autos and pausage while the list is filtered

(3) Double-click the browser.tabs.remote.autobegin.2 preference to switch the worth from true to false

Note: the precise name of the choice may differ, yet it will certainly begin via internet browser.tabs.remote.autostart

At your next Firefox startup, it need to run in the typical method. Any difference?

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