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 ...

Mozilla has announced today plans to discontinue one of the three methods through which extensions can be installed in Firefox. Starting next year, Firefox users won't be able to install extensions by ...

If you want to develop browser extensions for Chrome, Safari, Firefox, Opera, and other browsers, you’ve probably seen the phrase ‘WebExtension’ in support documents. Even though WebExtensions and ...