Rated 5 out of 5 stars

Perfect! Just what I was looking for!
Congratulations, Mr. Chee!
SeaMonkey is by far the best Browser & Email client and this add-on completes it. Now the only add-on I am still looking for is a bookmarks synchronization tool that includes all major browsers (Seamonkey, IE, Firefox, Chrome, Safari, Opera). I also would prefer to be able to close each tab separately without having to right click on it or using the menu (little cross for closing on each tab would be nice) as the closing cross on the right side only closes the last opened tab.