Middle-Click Fullscreen wot DJS

Use this add-on to:
- Enable fullscreen toggle on middle-click (for some websites you need to move the mouse cursor over the video to be enlarged)
- Autoplay videos when entering fullscreen
- Seek (backward/forward) with mouse wheel left/right
- Modify volume with mouse wheel up/down (when in fullscreen)
- Video speed change (right mouse button + mouse wheel left/right)