Why do Firefox and Wndows Task mgr show such different values/
Firefox (84.0.2 x64) has recently become a memory hog to the point where my system (W7) slows to a point where it is unusable. I do not wish to spend an entire day (or more) troubleshooting in the hope that I can make go away a problem that didn't exist 1 month ago do so how can I roll back to an earlier release (say the one running in december last year) which did not have any of these problems?
I attach two screen prints from a laptop (W7 12GBRam) running one instance of firefox with maybe 20 open tabs Windows Task Mgr which shows Firefox with 9 processes using around 5GB with one process using 2GB Firefox task mgr which shows 25 tabs using a total of around 0.5GB
Clearly the info in the firefox taskmgr is rubbish - or rather not reporting the same thing!
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Did you check the about:memory page as well as that show all processes ?
about:performance only shows the memory use of tabs and extensions in tabs.
There's also a new about:processes page in recent releases of Firefox. That shows the URLs mapped to the OS processes so you can get a better idea of which pages are in the big processes. It also shows some special processes that may not have a URL associated with them.
Thanks. I'll have a look. And see if that sheds any light