Firefox CPU usage

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Revision as of 04:24, 14 January 2007 by SteveChapel (talk | contribs) (→‎Other causes: add advice about submitting a bug report)
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Sometimes Firefox uses excessive amounts of CPU as reported by Windows Task Manager or by the top command on Linux.

Excessive CPU on certain web sites

If Firefox uses lots of CPU on certain web pages, please report the problem using Help -> Report Broken Web Site. Usually there's executable code on the site that is consuming the CPU. On the other hand, if a bug in Firefox is causing the excessive CPU usage, this will help track down the problem.

The Flashblock extension can help the problem by blocking Flash code that consumes excessive amounts of CPU.[1][2]

Other causes

  • Read the Firefox hangs article for other solutions to Firefox consuming lots of CPU.
  • If none of the solutions on these pages fixes your problem, you may want to file a bug report. This is a list of unsolved bugs in Firefox that cause excessive CPU usage. Look through the list, and if your situation doesn't match any of the situations listed, file a new bug report. If you cannot give a set of steps that reproduces the problem, you may want to try to find a regression window to determine which change to Firefox caused the problem.