Rated 4 out of 5 stars

Works nicely, but the built-in link target tooltip is bothering from there on.
There is a very simple line either to add to your userchrome.css or to run via a Stylish script (at: http://userstyles.org/styles/46045/firefox-4-hide-url-tooltip-popup-status-panel )

That is: statuspanel { display: none !important; }

Both 'Url Tooltip' and that script here on Firefox 5.01/Windows XP SP3

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