[acdha]

I hope they run with the idea of a single dedicated share button (like iOS): you can add the services you use, rather than those that a publisher chose to embed, and with more work it'd be nice for starting to back away from endless third-party tracking because you wouldn't need to execute FB/Twitter/etc. JavaScript on every page in the hopes that someone will use it.

There was some noise about this in August but it doesn't look like more than an initial trial balloon: https://blog.mozilla.org/blog/2013/08/06/firefox-makes-it-ea...

[voyou]

Web Intents[1] would have helped with this, but they don't seem to have got much traction (Wikipedia says Google have stopped working on the idea).

1: http://webintents.org/

[acdha]

Agreed - I remember hearing about that but it feels like a relic of the days when Google wasn't trying to shove everyone into Google+