Firefox CPU usage: Difference between revisions

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(started a "Related bug reports" section and added bug 213637)
m (→‎Related bug reports: added Bug 265172)
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==Related bug reports==
==Related bug reports==
*[https://bugzilla.mozilla.org/show_bug.cgi?id=213637 Bug 213637 – Mozilla runs at ~100% cpu usage after connection is interrupted or wakeup from hibernate or standby]
*[https://bugzilla.mozilla.org/show_bug.cgi?id=213637 Bug 213637 – Mozilla runs at ~100% cpu usage after connection is interrupted or wakeup from hibernate or standby]
*[https://bugzilla.mozilla.org/show_bug.cgi?id=265172 Bug 265172 – Hang and 100% CPU usage sometimes during restore/resume from sleep/standby/hibernate - update your flash player]


== See also ==
== See also ==

Revision as of 23:36, 7 April 2007

This article describes how to prevent or work around high CPU usage in Firefox.

Only on specific pages

Plugins

If you're only having problems with sites that use Flash, use the Flashblock extension to selectively enable or disable it.[1][2]

If the problem happens when viewing PDFs, it's likely a problem with Adobe Reader. One possible fix is to create a WWW_OpenURL directory in the AdobeUM directory.[3]

JavaScript

Some sites can cause high CPU usage through extensive use of JavaScript. You can disable JavaScript selectively using the NoScript extension.

Firefox bugs

Report the site using Help -> Report Broken Web Site. Reporting the problem will help Mozilla track down any bugs in Firefox.

All the time

Extensions

Problematic extensions can cause excessive CPU usage.

Windows Compatibility mode

Firefox can cause excessive CPU usage if it's set to run in compatibility mode for an older version of Windows.[4] To fix the problem, right-click on the Firefox icon you click to start Firefox, click Properties, click the Compatibility tab, make sure the check box under Compatibility mode is unchecked, and restart Firefox.

Hardware acceleration

Disabling cursor and bitmap hardware acceleration on some video cards and drivers can reduce CPU usage when displaying images.[5]

Related bug reports

See also