I want to install a browser extension that allows me to click anywhere in a thread on major sites, such as Stack Overflow, Quora, Bitcointalk, Stack Exchange, Facebook, Twitter, Google+, etc and it will identify as best as possible the poster. Once the poster is identified a window will show some actions. Well, I am interested to add as an action "Give Tip" button. Another one could be "Get PGP key". Another one could be "identify this person to be this other user on another forum". Another one: See what this person said in the last x days. So it will be general system with pluggable actions -- users will enable the ones they care about.