Want to condense your add-on list to see more than just a few items without having to scroll down? This tiny addon can clean-up wasted space from the addon manager in Firefox (and Thunderbird) without compromising any functionality. Very useful if you have a ton of addons installed or a small-sized screen, and hate to scroll every now-and-then. Open the Options page to explore more possibilities (v5.0+).
Please share your feedback for further improvement of this addon.