If you are a gamer, and especially loving first person shooters, you know how computer games require much of rapid clicking of the mouse. But, there is a certain limit of how fast and how much you can click before your fingers start to hurt. Well, there’s an option for fixing this. You can modify your mouse and add rapid fire button, it will enable you to activate fast clicking just by holding one mouse button. So you’re asking now, how can you do this?