Google is starting to shut down uBlock Origin and other older ad blockers for Chrome, but there are steps you can take to keep blocking ads just like you always have.
lifehacker.com
I've been blissfully unaware -it seems my preferred blocker (Ad Blocker Ultimate) has made the move to Manifest V3.
I tend to use Firefox (even on my Mac), but do have a Chromebook as my knock-around computer ... and so have to use Chrome (although I can fire up my Firefox flatpak from the Linux VM) but if it gets to the point that I am not in control of what extensions I want to use, it will be my last. To be frank, I think this Chromebook might well be my last as they're now on about merging Chrome OS onto Android. Urgh! I won't have a Windows computer in the house, so guess it'll be an Apple laptop next.