From the article:
Firefox plans to support Manifest V3 because Chrome is the world’s most popular browser, and it wants extensions to be cross-browser compatible, but it has no plans to turn off support for Manifest V2.
I doubt they’ll ever choose to shut down V2, but Google is already forcing their handa little by making them require supporting V3 to stay relevant
Andromxda@lemmy.dbzer0.com 5 months ago
That’s not how it works. Firefox has full support for Manifest v3 extensions, but it does also support MV2 at the same time, and aims to keep MV2 support alive in the future.