Sleazy Fork is available in English.
Shows just fullsize Image with hotkeys & without pop-ups on many image-hosting sites
Just noticing similar behaviour with imagebox and imagevenue. Anything to do with Firefox update [41.0] the other day?
worked fine for me on 40.0.3 and now on 41.0, give examples
and check if other extensions or userscripts cause this.
Working properly for me too.
Imagebam
Imagebam seems to be misbehaving for the past few days - for me at least it is not going to the base image.