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Firefox is like the plague for my computer dramatically slowing it down as soon as it opens

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  • 2 have this problem
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  • Last reply by cor-el

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As soon as I open firefox it automatically slows down the whole computer the only way that I can quit firefox is to force quit it. Turning off hardware acceleration doesn't help one bit either.

As soon as I open firefox it automatically slows down the whole computer the only way that I can quit firefox is to force quit it. Turning off hardware acceleration doesn't help one bit either.

All Replies (3)

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You can try to disable hardware acceleration in Firefox.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

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That only made the problem even worse.

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Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.


Create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.