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Firefox is unbearably slow after updating (/questions/985969)

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  • 30 人有此问题
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  • 最后回复者为 cor-el

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Extremely slow in paging up or down. CPU usage is at least 25%. The delay can be anywhere from 2 -20 or 30 seconds. It effects other programs that are active.

Extremely slow in paging up or down. CPU usage is at least 25%. The delay can be anywhere from 2 -20 or 30 seconds. It effects other programs that are active.

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Start Firefox in Safe Mode to Troubleshoot the issue and to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

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Try to set the Flash plug to click-to-play by setting the permissions for Flash to "Ask To Activate" in "Firefox/Tools > Add-ons > Plugins". That way you can activate the Flash plugin when you need it via the Lego block icon on the location bar.

Also please update the Flash plugin to the latest version.

You can find the latest Flash player versions for Firefox on this page:


You can check for problems with current Shockwave Flash plugin versions and try this:

See also: