Kind of works. It is very inconsistent at blocking users in replies. If you go to their profile and refresh, it'll block them then. Otherwise, it doesn't do a great job. The console logs also state it's due to "NFT avatars" which isn't the case
Works if you click through to a profile. Twitter is so buggy these days it might be working otherwise. Other reviews are blaming the addon but it's Twitter's janky front-end code that is preventing the UI from being repainted correctly.
This would be great, but it currently isn't doing anything for me. I still see Twitter Blue people in replies, which is the only place I'd see them to begin with.