I read the new language to mean: they are going to record your input streams and feed them to AI/LLM - thereby recording your previously private info that they used to discard and protect. Up to you, I use Chrome because it integrates well with the gmail account I’ve used for 25+ years and I appreciate the “login anywhere and get your same setup” functionality, as well as the ability to nuke remote login sessions.
Depends on which way the Firefox ditchers jump - jumping to Chrome, yeah… not great. Jumping to more privacy respecting options… it’s your data, you should be able to choose (if you care…)