It must be common and to see on many websites, the icons to share the article or post that is being read, to share it on Facebook, +1 from Google+, Twitter, and dozens more, since social networks are currently enough.
This is often annoying, it becomes cumbersome to see so many icons and I don't know about you, but personally I think it is overloading the site ...
The guys at Mozilla as always, bring us a solution that at least I love.
«What do you think if those icons instead of being on the page, were in the browser?«
This initiative is not just an idea, you can even try it through the following download link - » Firefox Share (Alpha)
At the moment only supports Twitter y Facebook, however it is only an alpha version, the first thing that has come to light, the boys of Mozilla Labs They claim that it will support so many services and websites that there will not be any dissatisfied user 
Greetings and ... approve it HAHA.