This is a add-on that creates an overlay window that displays rolling comments (aka. Danmaku). This can become handy if you want the rolling comments experience from Asian video-sharing sites while watching shows on Netflix or Youtube.
It adds a floating transparent canvas that displays comments and keep them sync-ed with the playing video on the webpage.
Fix the issue where some websites' player overlap on top of this addon. - Instead of using a hard-coded zIndex, now the addon uses zIndex that is 1 more than the "frontmost" element on the current window.
