Idk, I like the idea of my browser warning me when a random website I visit tries to talk to my network. if there's a legitimate reason I can still click yes. This is orthogonal to any ads and data collection.
I have this today from macOS. To me it feels more appropriate to have the OS attempt to secure running applications.
No you don’t - you get a single permission prompt for the entire browser. You definitely don’t get any permission-site permission options from the OS