Sleazy Fork is available in English.
Shows just fullsize Image with hotkeys & without pop-ups on many image-hosting sites
Can be done probably, just give me a link to a non-image file and a video file to make sure it would not mess shared non-images.
added
Add: DropBox
https://www.dropbox.com/s/kn9k05o4jhm1h98/2015-06-09%2017.58.19.jpg
It'd be great to not have to allow three domain scripts and cookies just to see an embedded image!