One of the prime offenders of multiple tab syndrome is the random Google search. You open a new tab, type in something, and then move on with your day completely forgetting about that tab. Searchlet is a bookmarklet that searches Google, Wikipedia and more from the tab you're currently in.
Searchlet works in any browser by searching directly from your bookmarks bar as a bookmarklet. To use it, just highlight some text on the page you're on and click the bookmarklet, or click the bookmarklet and search from there. You can look at Google results, Wikipedia articles, dictionary definitions or news, and you'll never leave the page you're on.