Please note that this add-on used to be known as FB Photo Zoom.
These thumbnails appear all over Facebook, from photo albums to the profile picture that appears next to you name when you like or comment. These can be hard to see without opening albums or looking at a person's profile. If you've noticed this problem, try Photo Zoom for Facebook for size.
Photo Zoom for Facebook is a very simple add-on, with no configuration settings or things to change. Once you're logged into Facebook, mousing over a thumbnail (or photo) will cause a full-size version of the photo to appear. When you mouse away, the photo disappears. It's that simple!
Want to see small Facebook photos better? Install Photo Zoom for Facebook - it couldn't be easier!