Excellent when working Rated 4 out of 5 stars

This extension is a great plus for Fx but the latest version of 2 Pane Bookmarks for Fx v3 has an issue in blanking out the bottom bookmark pane.

It does works intermittently and once this issue is addressed and fixed I will install it again.

This review is for a previous version of the add-on (0.4.2008052701).