Cryptotab is a chrome-based browser that lets you get btc without doing practically anything while browsing!
If it all seems too good to be true, wait until you hear the rest: the browser has practically no effect on your PC's performance (any more than it does chrome) with the difference that it gives you bitcoins just for having it installed.
It also has a dense network of invitations from which you can significantly increase your income and if you wish you can also install the mobile browser to further increase your earnings
