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I need to collect data on firefox CPU usage during web-development coding session and I'm wondering if it is possible to monitor CPU usage of particular firefox plugin.
Right now i'm using windows' perfmon.msc, but it will only allow me to monitor firefox process as a whole.
Do you know any tools that would allow me to get CPU data from a plugin? Is it possible at all ?
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This is normal. For some time now, Firefox has been using a feature called multiprocessing. Many other programs use the same approach. Rather than running everything in a single Firefox process, the various parts of Firefox are split into different processes.
Task Manager - see what tabs or extensions are slowing down Firefox. Firefox's "about:performance" page shows you what tabs or add-ons are making Firefox slow.
Actually Firefox does have a built-in "Task-Manager" for a few years now. Just type about:performance in the URL. It shows Name, Type, Energy Impact and Memory of each tab and add-on.
If you want to dig deeper Shift + F5 opens the performance tool where you can record e. g. opening a website and look into timings etc.
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