Key feature longer works in Firefox 4 or 5.0 Rated 1 out of 5 stars
When you select to not open already visited links it doesn't do that. A real pity since this was small and fast to open image links. Going back to Firefox 3, that's how much I love this extension.
By the way the one star is not meant for the developer. When I installed Firefox 5 it didn't warn me that this extension would not work. The one star is for Firefix 5.