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Windows 7: Firefox using too much CPU usage...

17 Oct 2010   #1

Windows 7 Professional x64
Firefox using too much CPU usage...

Within the last couple of weeks, my CPU usage has been jumping from 35% to 60% while Firefox was running. When I closed it, the usage dropped to under 4%. I was running FF v3.6.2 and upgraded to 3.6.10 with no change to CPU usage. I haven't added any more extensions. Any idea why this is happening?

My System SpecsSystem Spec
17 Oct 2010   #2
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

I would suspect one of the extensions. Go thru those one by one.
My System SpecsSystem Spec
17 Oct 2010   #3
Windows i7 920

Windows 8 Pro x64

Firefox has a safe mode. Have you tried this? If safe mode runs with no issues, it is likely one of your extensions.
My System SpecsSystem Spec

17 Oct 2010   #4

Windows® 8 Pro (64-bit)

Firefox generally uses more resources as compared to other browsers. As said by the above member, try firefox in safe mode. To enter safe mode type: firefox -safe-mode in the Run box.
My System SpecsSystem Spec
17 Oct 2010   #5
Not Myself

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1

My System SpecsSystem Spec
18 Oct 2010   #6

Windows 7 Professional x64

About a year ago I was having the same problem. I solved it that time by installing the FlashBlock extension. I have not installed any extensions for over a couple of months, so this is probably not due to an extension. I even noticed that when I click on a tab, it takes a 2 or 3 seconds before the tab opens.
My System SpecsSystem Spec

 Firefox using too much CPU usage...

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