Rated 5 out of 5 stars

I frankly thought it was going to be useless until I tried it. It is really good and I feel that I will get used to having a vertical bar and leave room for showing the URL and also have less clutter on the top, where I always look for controls I commonly use.

I wish Mozilla can incorporate something like this in Firefox and add more functionality to it. This is way better than the new Firefox 4 menu.

This review is for a previous version of the add-on (0.2.1-signed).