I have uBlock Origin and Privacy Badger installed, in addition to several other add-ons, on both Chrome and Firefox. Firefox uses much more CPU on Reddit’s homepage than does Chrome. (I do not know if Firefox uses more CPU on other pages yet.)
I tried deactivating all add-ons; the CPU usage remained high.
I tried reinstalling Firefox; the CPU usage remained high.
Any ideas to reduce CPU usage?
Without any concrete data, all I can offer is general advice for the moment.
about:performance to see how resources are being used by your tabs and browser addons.
If you're still suspicious that something's not right, it may be worth creating a new blank Firefox profile for comparison.
Answered by BoffinBrain on November 2, 2020
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