I've been using Brave on my Windows install. I think it's OK compared to Firefox, but I can't help but feel like all the UI and terminology is very "crypto" tailored.
Anyway, I think this feature is a good idea. I didn't even realize this was a big problem with modern OSes. Out of curiosity, do port scanning features like this escape application sandboxes? (Like flatpak, docker containers, etc?)
To be fair, federated social media is a very different "beast". I wouldn't say that I want all social media to go away myself, but I think the idea of monopolistic ad-driven social media (what I now call corporate social media) is harmful to society, doesn't scale well to the larger world and importantly doesn't condone meaningful discussion. In that regard, I could say that I don't want corporate social media or at least want that experience to be partly sandboxed.