Imagine stumbleupon had a search engine. You could find great things that other people liked and skip all the spam. Well you can use stumbleupon as a search engine. But it works almost like Google’s famous feeling lucky button.
Just activate the search function in tools-toolbar options-configuration and then click on show search / tag box
That’s it. Now you can just enter your words in the search bar and click stumble.
That is how you can almost turn Stumbleupon toolbar into a stumbleupon search engine.