mozilla-stumbleupon 2.8.9-2 (i386 binary) in ubuntu feisty

 StumbleUpon is a toolbar for Iceweasel which
 acts as an intelligent web-browsing tool.
 .
 It facilitates discovery and sharing of great web sites.
 Using collaborative filtering, web page ratings are used
 to recommend high quality pages tailored to your
 preferences.
 .