By supporting the same API as Chrome, Mozilla ensured that extensions written for Chrome could easily port to Firefox. WebExtensions is used in Chromium, the open-source browser project on which Chrome is based, but Mozilla decided to support it too back in August 2015. The WebExtensions interface gives the extensions a way to exchange instructions and information with the browser. WebExtensions is a set of interfaces that browser vendors offer to the developers of extensions, which are programs that extend the browser’s functionality. The Foundation made its announcement on Tuesday in an FAQ updating developers on its plans for the WebExtensions application programming interface (API). Mozilla has told developers not to fret – it won’t follow Google in tweaking its browser to be unfriendly to ad blocking software.
