Rated 3 out of 5 stars

From Duplicate tab there is a jigsaw piece that shows up in duplicate tab extension under Firefox 3.6. If you install duplicate tab extension into Firefox 4 beta 10 at time of typing this (needs a max version hack to get it to install), the jigsaw piece shows up.Contd.

This review is for a previous version of the add-on (1.1).