Extremely annoying! Rated 1 out of 5 stars

v0.2.8 has a bug, as noted in the review prior to mine: toolbar is always open. never retracts. Duh!!! In other words, the add-on has been rendered useless.

This passes muster as an 'update'?? Nobody tested it first?

Then the developer replies that the bug has been fixed in v.0.2.9 - which is not available here or on the homepage.

Sends 43,752 users on a wild goose chase. No integrity.

This review is for a previous version of the add-on (0.2.8). 

Ver.0.2.9

Ver.0.2.9 is available here:
https://addons.mozilla.org/firefox/addon/vertical-toolbar/versions/
before it will pass the review of AMO editor.