Alt-Tab in windows is really nice (especially in Vista), with little thumbnails etc. - why can't we have that in our favorite browser (meaning Firefox, of course!) .. well - Now we can! :-)
With a new add-on called Ctrl-Tab you get the a thumbnail view of your previous, current and next pages, and pressing F4 gives you a complete overview - It looks something like this...
The bits can be downloaded at: https://addons.mozilla.org/en-US/firefox/addon/5244