Rated 5 out of 5 stars

le The Ronny ar Márta 22, 2010 · buan-nasc

Just visit author's homepage (http://www.urlparams.blogwart.com/share/downloads.php), download and install latest version which is compatible with FF 3.6.*
And by the way.. For me it is the second best tool for FF right after Firebug.