Hello,
from what I understand, the point is not if a web browser implements
Manifest V3, but how it does so.
Chrome disables certain features (blocking WebRequest) used by adblockers.
Chromium still allows to install Ublock Origin (normal version, not Lite
version) but warns that perhaps in the future this extension it will not
be allowed anymore
Firefox, albeit already implementing MV3, keeps enabling those features
used by adblockers:
https://blog.mozilla.org/addons/2022/05/18/manifest-v3-in-firefox-recap-next-steps/
