This plugin makes html 5 videos full size in a window. This is especially useful if you have only one large screen and want to seperate space. This plugin was tested only on firefox, but should also work on chromium based browsers.
To use, click the icon in the extension bar, next to the address bar or press Ctrl+Shift+F. The shortcut can be edited in Firefox 66 or newer. If no video was found, a message is shown.
To undo windowed fullscreen, simply click again on the icon or refresh the website, e.g. with F5.
expand icon is from fontawesome and tinted with gimp.