Hitting the Wayback Machine
I find myself hitting 404ed pages all the time, and wanting to look the pages up in the Wayback Machine to see what they said when they existed. So, a quick bookmarklet: Get archived version. Drag to your bookmarks bar and click when you hit a 404.
Nice.
26 hours later
I’m currently using https://addons.mozilla.org/firefox/318/
(but then I don’t dig bookmarklets…)
30 hours later
Among others, this one works great and encapsulates a few options https://addons.mozilla.org/firefox/2570/
31 hours later