Gmail-like keyboard shortcuts for the Messenger web app (messenger.com).
Want to stay online but too tired to move your mouse? We've all been there. Keyboard Shortcuts for Messenger has you covered. With KSM, you'll be able to compose messages and jump between conversations with ease and agility -- all without clicking anything!
This extension is open source! Contribute your ideas and comments at http://goo.gl/PVw7ub.