Super annoying bug, you can fix it by clicking url bar and then trying right click again and it fixes it temporarily until next time.
Plenty of companies have been shoving all the unstructured data they have about you and your friends into a big neural net to predict which ad you're most likely to click for a decade now...
Because for me chrome vs firefox (both 115)
- ubuntu desktop: 148(+-2.2) vs 126(+-6.5)
- android phone: 95.8(+-2.0) vs 78.5(+-4.3)
So it looks like chrome is faster and delivers a more stable performance while firefox is slower and more inconsistent on performance