I just came across this Add-on for fire fox and I cant believe how much I'm learning from it. Just right click a photo and choose to see all of the exif info for that photo.
I have an exif viewer for Firefox as well.. Not the same as the one you posted. The one I use is Opanda IExif. They make an Exif viewer for the local machine which I have and then they came out with the FF add-on.
