Even if you're on a site that doesn't have Lightbox, you can still enjoy that in-tab enlarging of images by downloading Image Preview. Once Image Preview is installed all images you click on will enlarge within the current tab and provide an in-tab view of the larger image instead of opening the image by itself.
Just like with Lightbox, clicking anywhere on the screen—including the enlarged image—will remove the dimming mask and the image and return you to the normal page. Image Preview is a free extension and works wherever Google Chrome does. Have a favorite extension? Let's hear about it in the comments.
Image Preview [via MakeUseOf]
