edit: culprit found: dashlane extension for firefox causing latency and high use of resources… dashlane claims they are waiting on mozilla to review their patch submitted 3 weeks ago:

https://bugzilla.mozilla.org/show_bug.cgi?id=1838448

i have a feeling there is something horribly wrong with 115.

firefox has been lagging and using too much ram. 114 was the best patch in history but now its back to the same old struggling firefox. or worse.