Rated 2 out of 5 stars

The original "Add Bookmarks Here" extension plus the OpenBook extension offer a superior user experience to this 'squared' version.

Add Bookmarks Here:
https://addons.mozilla.org/en-US/firefox/addon/11

OpenBook:
https://addons.mozilla.org/en-US/firefox/addon/42

This review is for a previous version of the add-on (3.0.20080815).