you can do by checking preference settings of that browser. I have not used it so don't where that option lies exactly but it will be their just find it in preferences. or as you said you are on windows 7 so you can use "Default programs" window in Windows 7.. Just type "default" in start search bar you will get "Default programs".. just go in it.. select your browser and click on "set this Program as Default" at bottom of Page.