nostr:npub17lgy0rj5a2nwpnyc4hup6ufpfz7wz6dzcgd3crm6fm2yd34dcz0qlk9uux I haven't tried this with Edge, but with Chrome I believe this setting works in Windows 11.
Settings and disable the badge feature.
Discussion
nostr:npub1a9a7t0rnhu0cqwnnhe28dznw0fk6drhwp5kf8j8tf5qv7smykqlqqg3xep doesn't make any difference (it's not a badge).