Rated 5 out of 5 stars
It obvious that the developers didn't have aesthetics in mind when making the toolbar, However the toolbar can be hidden with only a single button visible for the searchbar leading to a drop down.
I use this extension on both Firefox and SeaMonkey , there are tools I use daily:
toggling on/off off plugins like flash and Java (you can find buttons to import for PDF and and Silverlight),
toggling the focus of new tabs,
resetting zoom, restoring and closing tabs,
changing user agents, turning on/off Caches,
Toggling on/off the pipeline configuration,
and a whole lot of other buttons.
This is an essential extension for Firefox and SeaMonkey, IMO.