ZimRim-KeySearch web-extension will provide you keyboard access to the web.
You can share current web-pare URL with most of the social media (Facebook, Twitter, Google+, LinkedIn, Digg, Reddit, StumbleUpon, Tumbler).
New tab will be redirect you to www.zimrim.com, you can manage this redirection in setting of this web-extension.
You can disable certain list of domain in which you don't like to use these web-extension.