Sleazy Fork is available in English.
Shows just fullsize Image with hotkeys & without pop-ups on many image-hosting sites
added
if no picture is found - script does nothing. (except turning javascript off in firefox)
works fine in my Chrome.
I get no errors at all with latest stable GM from mozilla addons website and Firefox 31 (nor with Chrome): https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/?src=search
Add: ImageBucks.biz
http://imagebucks.biz/k07cveef9bpb/10535102_304281019747517_1918800834_n.jpg