Exif Everywhere displays exif data for images on Web
Stashed in: Reverse Image Search!
Exif Everywhere operates either as a standalone desktop app or a browser extension in Firefox, Safari or Chrome. When browsing, all you have to do is place your cursor over an image and hit the Control key to reveal the EXIF data in another window. It worked with most websites that I tested. The biggest exceptions were the photo hosting websites like Flickr and SmugMug, which hide that information from the browser.