Both Chromium and Furryfox still support V2, but Goolag has already stopped accepting V2 extensions to be submitted into their extension store earlier this year, and they're set to completely delete V2 by the beginning of next year, no wait, by summer of this year.
This is why uBlock Origin and uMatrix still work for now, but won't be for long.
Especially uMatrix because that one is no longer maintained, but uBlock Origin has a "lite" version designed for V3, which even the developer himself admits is way less powerful than the regular one, which is V2 only.