Firefox 4 - don't trim the URL preview

To stop Firefox 4 from trimming the URL in the preview and loading pop-ups, edit your <profile>/chrome/userChrome.css thus:

statuspanel {
max-width: 100% !important;
}

source: http://www.lifehacker.com.au/2011/03/stop-firefox-4-from-trimming-url-previews-in-the-status-bar/