@julian
just some historical context,
since at least 2010 (16 years ago) registerProtocolHandler is specified and worked for mailto: then for tel: (cause nice for gooles android)
back in 2015 (11 years ago) we (w3c SocialCG) had talked to all the browser makers about making ActivityPub and webmention trusted protocols.
In 2016 (T-10 years) I demoed the existing practical problems at Jeremy Keiths indiewebcamp in Brighton see the demo https://www.youtube.com/live/W70wd56i0Bg?si=DJgm9WsGpwzaLdGJ&t=2030 (indiewebcamp demos are written in incredible short time ā¦)
Anyway - nothing changed at the browser makers except the browser makers switched their positions from company to company. @jaffathecake :)
[edit; well: Mozilla did BrowserId, renamed it to Persona and directly trashed it cause then gaming and AI [where the parts of the teams went to] was more important ā¦
@ricferrer @benpate