Firefox extension Reveal creates thumbnails of your tabbed pages, allowing you to select, reorder, or even sort through pages in the session history.
Pressing F2 will bring up your thumbs, at which point you can even search through them with a Find feature. Beyond that, Reveal shows thumbnails of your page history if you rest your mouse over the Back and Forward buttons, and allows you to zoom in on the page your visiting with a triple click. After you’ve installed Reveal and restarted your browser, it takes you through a nice step-by-step tutorial on how to use it. This is the coolest new Firefox extension I’ve seen in a while (cool as in 50% fun, 50% useful), and definitely worth a look.
[Download the Reveal Firefox extension]