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Why is Firefox suddenly causing CPU overload?
Someday, your computer is suddenly running very slow and when you press Ctrl-Alt-Delete the CPU is running and 100% in the performance tab and in the processes section Firefox is anywhere betweenರ-98 CPU processes. Firefox periodically either freezes completely, gets extremely laggy (eg: typing into a field on a web page produces 1 character per 2 seconds), the CPU is being hogged >50% by Firefox, and the memory usage keeps growing upward of 60 MB and higher.
Firefox is the best browser around right now, with a large open-source community behind it. Firefox maybe the best in terms of features and flexibility, but all of this comes at a price. Firefox is a resource hog. Firefox 3 has been a lot better at managing resources, yet it has high memory usage, and occasionally, CPU usage hit 100% and the system hangs. It can take up 140 MB of RAM when multiple tabs are open.
There are many reasons for Firefox hanging and/or using excessive memory. Plugins and extensions, which are not part of the default Firefox install may cause this. Poorly optimized sites which load several images and ads may cause this. These are inevitable.
This article describes how to prevent or work around CPU overload in Firefox.
Originally posted 2011-06-08 15:56:08.
