Rated 5 out of 5 stars
Love this...but...seems to be broken in Firefox 8.0. The searches no longer populate the bar when a new page is loaded.
So...perform a search--click the link in the Google results...and...the bar is now empty.
Hopefully there will be an upgrade soon as not having the terms carry over negates the major functionality of this essential tool.
Version 4.8.2, which has been submitted here for review, will correct this issue.