Comment by crazygringo

If CNAME cloaking takes off in a big way, then yes at that point I agree I could see people moving to Firefox. But for now that's not happening.

Also, if that actually led significant numbers of people to leave Chrome, isn't that where we'd see "Manifest V3.1" or whatever that allows matching against CNAMEs?

Chrome is pretty central to Google's strategy. If we assume that people who want to block ads will (by switching to Firefox when necessary), then it's in Google's interests for Chrome to support ad blocking. If they're not going to get ad revenue anyways, they'd still rather it be happening on Chrome.

Also see a recent comment by a member of the Chrome team on why Manifest V3 was for performance reasons, not to cripple adblocking (I don't know if it's true, but it seems worth considering): https://news.ycombinator.com/item?id=41815861