Brave still allows you to install uBlock & some other extensions that should technically not be supported under MV3, but they still ship it with support for those.
Just heard about Helium browser, which is just dechromium + uBlock and it's still beta.
My last hope is ladybird right now, I don't use Firefox or Chrome as my main browsers anymore, and use them only within temporary sandboxes. Without history, without cookies, without logins for the most part.
That said, if this is writing on the wall I’d hope they’ll listen to the community this time and allow the engine to be extended / make it such that a block all ads feature always exists. I’m cautiously optimistic given Mozilla’s track record just over the past year-ish. They have released some great new features that help bring Firefox closer to feature parity with other browsers.
I am a Firefox hopeful and recently switched back to using it as my daily driver when Arc went belly up (but mainly for uBlock Origin support).
There is no feature Firefox provides that is more differentiating than ublock origin. As long as pages load and security issues are patched it is the reason to choose Firefox as a browser. What would they prioritize over it?
The feature that better adblockers need is one callback that's similar to one that's still in V3. It's not difficult to keep if it's your own codebase.
Weirdly enough, the same time this was added to Geckko is when I started implementing the adblock-rs library for Waterfox - I stumbled across the bindings by accident when using searchfox on the main branch instead of esr140! Quite the coincidence doing it at the same time.
Maybe uBlock Origin for Firefox could be updated to make use of this
though it doesn’t seem to work as well as ublock, the ad slots are still there with just the ad missing so there’s a giant ugly blank spot.
My favorite recent feature has been Brave Scriptlets, which are just little javascript functions you can run on specific sites. I've replaced most of the add ons I used with small scripts. Pretty nice.
I would prefer an engine not built on Chromium... but I've lost faith in Mozilla. I'm glad that Firefox added a built in adblock engine, but it seems too late too late. Brave has been awesome, and being Chromium based gives them time to keep working on stuff that matters.
To sell for $60 a web browser that technically has all the features removed is a pretty goofy move.