Rated 4 out of 5 stars
This is a cool add-on, I like the search box, but still I didn't find what I am looking for, which is a toolbar button makes the add-ons as a drop-down list, any idea about that !This review is for a previous version of the add-on (18.104.22.168-signed).
Although it appears at the top of the add-ons manager page (rather than being a toolbar button), the autocomplete listbox (https://addons.cdn.mozilla.net/user-media/previews/full/67/67103.png) also provides a dropdown arrow, which when clicked shows a dropdown list of your add-ons, from which you can select by clicking. The listbox can be turned on/off by the 'Select Add-on' List item in Addons Manager Hilite Options. Also make sure you are using the current version 2.1.1 to insure proper functioning of the listbox on Firefox 31 and newer.