Firefox 2.x
Firefox 3.x
Internet Explorer 6
Internet Explorer 7
Windows
Mac OS X
Linux
"StumbleUpon is a browser toolbar for both Internet Explorer and Firefox. It scours the Internet for you, finding thousands of web sites that match your interests. Not only does this toolbar find endless sites based on the topics you are interested in, it also allows you to meet and message people with similar interests and create a network of friends. You are also given the ability to recommend, write reviews on, and share sites with your friends network via StumbleUpon's messaging system or with anyone else via email directly from the toolbar itself."
"StumbleUpon discovers web sites based on your interests, learns what you like and brings you more. With StumbleUpon you can also connect with friends and share your discoveries, meet people that have similar interests, and check out what other people are discovering."
"From time to time, browsing the Internet can become somewhat mundane. Perhaps you have grown tired of going to the same sites all the time, and perhaps your searches have come up empty when looking for new content relative to the things you like. Maybe you wish you could meet people with similar interests and visit sites that they like to visit. StumbleUpon, in an exciting way, reinvents the web surfing experience while allowing you to do all of this. You will find yourself immersed almost immediately as you "stumble" from site to site."
