User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

Hello,
I don't have a steps to reproduce, but the issue appeared already several times on two of my devices. It started around 101 release, maybe sooner.

I notice it because my CPU cooler is noisier than it should be and it's because Firefox is taking 100% of one of the CPU threads.
And it's also consuming a lot of memory over few hours if I don't notice it right away.
And when I open about:processes, it's always some google page - see the screenshot.
And no-there is no recaptcha opened on any of the tabs I have opened. But I've noticed before that closing a google search page removed this stuck process.

I don't know if this is Firefox or Google problem, but I think you should investigate because if I have this problem, then probably many others have it as well and there are many people complaining about high CPU / memory usage all the time.

Did this happen in a background tab?

Had this happen over a weekend while I was away from my computer, I guess an (invisible) recaptcha
was going crazy, looping and claiming memory.
Here the profile I captured back then.

I can't tell where was it running, I had only 3 windows opened so 3 active tabs and they all looked fine.
But when this happened at work, it was for sure the google search result page which was not responding.
And when this happened a week ago I remember some pages wouldn't load at all, like if all google requests were stuck.

In any case, if this is a Google bug, is there anything Firefox can do to fix it? Or notify user about it? Or even detect it?

Related report on Reddit: https://www.reddit.com/r/firefox/comments/w6824b/firefox_keeps_using_almost_all_of_my_32gb_of/ihc8qo6/