Why doesn't appear on jpg pages?

[Rigido71]

Hi,
I jut installed Exify and I found it brilliant but when I went to a site with small thumbnails and clicked on it to open a full size jpg image (I mean a Firefox page with a .jpg in the address bar)...I can't see any exif data, no way to make Exify appear.
I tried to load a local jpg lfile too, no luck.

I would add that, sometimes, it could be useful to have some image info (size for sure) too.

Thanks.