Latest FF on Macbook (two of them) is a bit slow and tab indicators often keep spinning

Hello, Seems that after the last update when I go to some websites at times the tab thinks its still loading until I stop it. This is happening on both of my Macbook Pros which are about 6 yrs apart age wise. I kept thinking it would stop doing this but that hasn't happened. Secondary browsers work fine. Open to suggestions. Also some AI usage trackers slowly stopped working but I can't image that's related. Thanks