FaviconizeTab

While Tab Utilities has a lot of stuff to offer, the only feature I really needed was to have the ability to Faviconize a tab. As B. Moore pointed out, there is add-on that does just that, FaviconizeTab. For those who want their links to open in a new tab to the far right instead of to the right of the pinned tabs or the current tab go into about:config, filter for browser.tabs.insertRelatedAfterCurrent and double-click to change to False. This add-on works with Firefox 4.0 and newer (Firefox 3.6 did not support App Tabs) and is about 10 KB in size.