I seem to be able to make images full-screen in browsers (ankiweb) but not in anki desktop (linux). There is methods .webkitRequestFullscreen() and .requestFullscreen() in anki but they seems to does not do anything.
Example deck: mega.nz/file/7dIXzS4R#TSdac0HswDOQEzOKJiSZFnuN85ZfyI10X-OxJSFczjc
Is that a bug or is it impossible at all to use this inside desktop anki?