I don't think any of this would stop me from using FF for day to day browsing.
2 - At this point I'd just pirate it. I don't care. If you're going to be hostile to paying customers, I'm going to be a non-paying customer again.
3 - Separate banking app. Not bothered about desktop banking
4 - Fine I'll support local businesses where possible, and use dedicated apps or if necessary Chrome (preferably sandboxed) specifically for shopping where not.
5 - Social media was a mistake anyway, already deleted Twitter, I need very little excuse to get rid of Facebook as well.
Honestly I think this is just the end phase of "Web 2.0" as I remember all this shit being labelled at the time. We managed fine with independent forums etc before and will manage again.
Edit: I love the irony that people are killing off Reddit due to API access but the only way I've been able to post on lemmy.world is via the website. Connect app? Nope!