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Multi-Account Containers pegging CPU

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I noticed that recently, several of my machines (all logged into the same FF account) are experiencing pretty extreme performance penalties, and when on battery, the battery drains very quickly. Within the Windows Task Manager, I see that FF is often taking up 50%+ CPU even though I'm using fewer tabs than usual. Within `about:performance`, I see that Multi-Account Containers is the resource hog.

On another machine where I am not logged in, FF performance is pretty good. On the affected machines, Edge runs very fast with low CPU/memory use, so there's definitely an issue with FF on these machines.

About:config shows that extensions.experiments.enabled=false, and the Containers plugin hasn't been updated in 2.5 months.

I would prefer to not uninstall containers since they're so useful. I could clobber and reinstall them for testing, but is there a known issue or a quick fix for this?

附加的畫面擷圖

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Multi-Account Containers is a Firefox add-on that lets you separate your work, shopping or personal browsing without having to clear your history, log in and out, or use multiple browsers. It's an improved version of the Containers feature built into Firefox Nightly and the completed Firefox Containers Test Pilot experiment.

https://support.mozilla.org/en-US/kb/containers