Summary: Experiment with Web Share API to figure out if the current spec is implementable in Gecko/GeckoView. The specification defines an API for sharing text, links and other content to an arbitrary destination of the user's choice. The available share targets are either OS specific, or can be other websites that are registered as "Share Targets". Web-based Share Targets are not in scope right now - that's a different spec .
DOM side - https://bugzilla.mozilla.org/show_bug.cgi?id=1312422
Android side - https://bugzilla.mozilla.org/show_bug.cgi?id=1402369
Link to Standards: https://wicg.github.io/web-share/
(This spec is migrating to the W3C's Web Platform WG in the next few weeks).
Platform coverage: Initially, Android (Fenix).
Estimated or target release: N/A
Preference behind which this will be implemented: dom.share
Is this feature enabled by default in sandboxed iframes? no
DevTools bug: N/A
Do other browser engines implement this?: Yes, WebKit, Blink. Shipping in Chrome for Android and Safari on both iOS and Desktop.
Is this feature restricted to secure contexts? Yes