Vertical bookmarks with FF15 - no problem! :) Rated 5 out of 5 stars

Vertical bookmarks broken in FF15? No Problem!

Deinstall "Vertical bookmarks toolbar" and install "Vertical Toolbar 0.3" (or higher).

You can find the newest versions of Vertical Toolbar here:

https://addons.mozilla.org/firefox/addon/vertical-toolbar/versions/

Just drag the "Bookmarks Toolbar Items" into the vertical bar.

EDIT: All thanks to Gomita. He's the guy who fulfilled our wish. :)

Won't get fixed :( Rated 5 out of 5 stars

"Sorry,
Because I do not need this extension, I cannot maintain it anymore.
Pls abandon this extension."

http://forums.mozillazine.org/viewtopic.php?f=48&t=686725&p=12238547#p12238547

Rated 5 out of 5 stars

Broken in Firefox 15.
Updated Firefox and Vertical Bookmarks Toolbar broke.