Problem with Firefox 120.0 (32-bit) in England

[stepcounter]

Since the recent update to the version of Firefox above, Firefox seems to have slowed down.  I get frequent messages saying "This page is slowing down Firefox. To speed up your browser, stop this page."  This message appears when trying to use WhatsApp, for example.  I am considering switching to another browser even though I have used Firefox for many years.  Has anyone else had this problem?

[sankalpmukim]

I have faced this problem recently. Do not know how to solve it. If you have it solved it, please tell

[cleek]

i just got 121.0.1 and the problem just started for me, and it's terrible.

lowes.com, for example, is basically broken - browse into a category and links will stop working, FF will start putting up complaints about LastPass and uBlock. utterly useless.

works fine in Bing, of course.