Excellent, necessary extension Bewertet mit 5 von 5 Sternen
I love this extension. I would find using Fx extremely difficult without this extension. I had no idea it doesn't work beyond Fx 4? I am using Fx4 (I see no reason to upgrade as I like Fx4, but eventually I will want to upgrade and I want this extension to work)! Having used Opera for over a year as my default browser and enjoying the builtin bookmark columns, I dreaded coming back to Fx when version 4 was released as I knew it has just one completely unusable, very long bookmark column. Then I found this extension and everything was fine.
I came to report an incompatibility with another extension (Open Bookmark in New Tab) and learned that evidently this wonderful multicolumn extension is not being updated for newer versions of Fx.
Please keep this extension updated! It is essential to the enjoyment and usability of Fx.