Slashdotter is an extension I wrote in 2006 in order to customize the Slashdot experience. It was covered on Slashdot and was received favorably by the Slashdot audience, but I don’t have the time anymore to update it every time Slashdot changes their UI or HTML.
If you’d like to take over development, let me know, and I’ll transfer the Slashdotter add-on to you on AMO; if nobody volunteers, I’ll be removing the add-on from AMO in a couple of weeks. (Like all of my browser extensions, Slashdotter’s source code is open source, so you could still develop your own version if you want.)