I love the zooming and panning, wish for rotation as others have mentioned.

I guess I found a bug:
When an image is loaded with an EXIF orientation that requires rotation, the image is rotated but the dimensions are not swapped. So you wind up with, e.g., a 480x640 portrait picture, stretched and squished to fit in a 640x480 area.

Edit: I skimmed the code and I'm not sure this extension is entirely at fault. Increasing my rating.

To the author, I'd have a look at whether naturalWidth and naturalHeight are read before exif orientation is used, and if anything can be done.

Edit again: maybe this only affects photos taken on an iPhone? I don't have enough examples to be sure.