Would be better if it supported ALL websites like Photo Zoom+ on Chrome does. After switching to Firefox from Chrome and finding out that Photo Zoom+ on Firefox isn't made by the same author as the one on Chrome and in fact doesn't work anywhere, I decided to try this add-on.

It works pretty good, and in some ways it's better than Photo Zoom+, but suffers in other ways; it could do without the fluff of animations and shadows and could use pre-loading of images as an option so you get less "image loading" nonsense.

Latest updates by the Dev addressed pretty much all of my issues, it works great, almost TOO great(?); for example it will now load a full photo when you hover things like the (···) dots menu on facebook! It works great on a multitude of websites.