In the Mac OS it is possible to change the default program the operating system will use to open a file when you double-click on it. After you have changed this file association, though, you may want ...

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

Ever since we started releasing home-brewed Firefox extensions here at Lifehacker, several readers have asked: How difficult is it to build a Firefox extension? For someone with a bit of programming ...