Shared components used by Firefox and other Mozilla software, including handling of Web content; Gecko, HTML, CSS, layout, DOM, scripts, images, networking, etc. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. (More info)
Created attachment 635236[details][diff][review]
Basically, the current state make us always allow screen lock for apps but we will still be listening for fullscreenchange and even unlock when fullscreen will be left...