Greasemonkey is a marvelous extension for Firefox. If I weren't already a Firefox user, Greasemonkey would be sufficient reason to start. Here are some Greasemonkey scripts I either created or altered. <ul> <li>dejalicious – Adds a marker to your page title to tell you whether you've already bookmarked this site on Based on the Familiar Taste script, my version caches your bookmarks so that won't ban you due to excessive site hits. Dejalicious Greasemonkey Script</li></ul>