Mozilla (despite its issues) is nowhere near as evil as Google and a browser monopoly is good for nobody.
Manifest v2 will stay supported on FF - uBlock will keep working properly.
It's time to switch. If you would rather have a UI like Arc, give Zen a shot! (It's what I use!)
I left because they kept stripping features out that I was used to whether it was my RSS toolbar feeds or something else. I forgot which feature removal was the final straw, or if it was a bug or two that irked me. While I was never a Chrome user, I found Edge was an alternative that I was happy with. I also see a lot of benefit to native browsers. Ironically, that I learned about from Mozilla's own devblogs.
Supporting V2 like this is the exact opposite of what drove me away. I'm cruising so happily on Edge that I'm unsure if I'm willing to do another shift, but I am going to reconsider my life choices.
Or maybe I am wrong about the facts? I never used Edge.