I guess we'll keep that article's title though (in de-baited form) because "Manifest v3 signing available November 21 on Firefox Nightly" would trigger weird responses.
Acknowledging these apprehensions, Mozilla announced last year that Firefox would continue to support the webRequest API to block entire categories of HTTP requests in its implementation of Manifest V3...
https://blog.mozilla.org/addons/2022/11/17/manifest-v3-signi...
Posting it here since there's a lot of questions being asked here in HN that are answered by the post.