Comment by chrismorgan

Links on support:

https://github.com/mdn/browser-compat-data/blob/main/manifes... (data integrated into the MDN page I linked)

Chromium: https://chromestatus.com/feature/5662315307335680, implemented on Android from M71 and desktop from M89.

WebKit: standards position is neutral <https://github.com/WebKit/standards-positions/issues/11>, and https://bugs.webkit.org/show_bug.cgi?id=194593 shows plenty of developer interest but doesn’t look to have been touched by Apple.

Firefox: standards position is positive <https://mozilla.github.io/standards-positions/#web-share-tar...>, but https://bugzilla.mozilla.org/show_bug.cgi?id=1476515 has languished.