You can read the details here: https://blog.mozilla.org/addons/2021/05/27/manifest-v3-update/ https://blog.mozilla.org/addons/2021/05/27/manifest-v3-updat... T

You can read the details here: https://blog.mozilla.org/addons/2021/05/27/manifest-v3-update/ https://blog.mozilla.org/addons/2021/05/27/manifest-v3-updat... TLDR: They're officially going to support MV3 but also not going to deprecate the network blocking APIs that Google is.