(Sending the intent email on behalf of the patch author)
Summary: Allow to register a protocol handler for the matrix scheme.
Bug: 1688030
Standard:
https://github.com/whatwg/html/pull/6320
Platform coverage: all (I think? not 100% sure what android does with
registerProtocolHandler)
Preference: None
DevTools bug: N/A
Other browsers: We're the first browser to implement this,
https://bugs.chromium.org/p/chromium/issues/detail?id=1169258 tracks
this on Chromium (assigned), and Safari doesn't support
registerProtocolHandler, looks like.
web-platform-tests: Landed along with the HTML spec PR.
-- Emilio