You will need to install a user script manager extension to install this script.
Improves controls for images & videos directly opened with your browser - with hotkeys & auto-resizing & custom visuals. You can configure background color of the page and of the loading image (so it won't be pure white anymore) & which images to fit (or fill) to window and which to leave in original size when opened. Video looping is enabled by default and sound volume is remembered
* A brother of Handy Just Image but for all images you open in your browser (directly - e.g. with "open image" after right-clicking on an image)