BookmarkPreviews is an awesome, but kind of useless plugin for Firefox that lets you scroll through thumbnails of bookmarked web pages using an Apple Cover Flow-style browser. When you install the add-on, BookmarkPreviews will create a snapshot every time you visit a page you've already bookmarked. Then when you open your bookmark manager you can scroll through them in graphical form.

The only problem is that we can't imagine a circumstance where it would be faster to scroll through your bookmarks this way than to just click on the one you're looking for. Plus most folks we know use online bookmarking services like del.icio.us to store their bookmarks anyway.

[via CyberNet