Last Updated Aug 6, 2008 12:00 PM EDT
The extension adds a Wired Marker sidebar folder to Firefox. After "highlighting" text, pictures, tables, and/or selected portions of the screen (which you can do in one of several colors), you drag and drop that selection into a bookmark folder. Meanwhile, Wired Marker remembers and displays those highlighted areas on future visits to that site (whether you bookmark it or not).
Personally, I'm loving this without even touching the bookmark folder. It's really handy to see highlighted areas when you revisit a Web page, as it saves you having to scan for the area(s) you found important in the first place. [via jkOnTheRun]