[id="what_is_adobe_flash"] = What is Adobe Flash Adobe Flash is a web browser plug-in used for multimedia. Adobe's Flash plug-in is not included in Fedora because it is not free and open source software. However, Adobe releases a version of the Flash plug-in for Fedora and other Linux distributions using Firefox, Chromium, and other popular internet browsers. Flash is less widely used than before because popular multimedia sites such as YouTube now use HTML5 for video playback instead. As a result, most modern browsers such as Firefox and Chromium can play videos without using the Flash plug-in. Google Chrome includes Flash by default.