"Begin disabling installed extensions still using Manifest V2 in Chrome stable"

Notably, Firefox is not removing v2 support (at least for now as of March 2024)

> Firefox, however, has no plans to deprecate MV2 and will continue to support MV2 extensions for the foreseeable future. And even if we re-evaluate this decision at some point down the road, we anticipate providing a notice of at least 12 months for developers to adjust accordingly and not feel rushed.[1]

[1]: https://blog.mozilla.org/addons/2024/03/13/manifest-v3-manif...

To my knowledge the “big” chrome engine alternatives aren’t either. I know that Vivaldi and Brave plan on keeping around v2 as long as it is economically feasible