I don't think post is talking about Web Environment Integrity. I instead think that it's talking about Manifest v3 as the Chrome web store now blocks Manifest v2 extensions from being submitted - with support expected to be removed from Chrome in 2024.
I don't think post is talking about Web Environment Integrity. I instead think that it's talking about Manifest v3 as the Chrome web store now blocks Manifest v2 extensions from being submitted - with support expected to be removed from Chrome in 2024.