An on-the-fly interface for easy creation of new addresses for mailnull.com, which provides an email anonymization and categorization service. This extension lets you control all aspects of address creation, with comments, passwords, timeouts, and more. It puts the new address in your clipboard on successful creation for easy pasting into webforms.
Updated for ff2.0. Also, I fixed Gray's animated gif in the about screen, which he has said he's sick of (the gif, not the about screen), but what're you gonna do? Otherwise the same quick, non-slick, workmanlike extension it always was. I use it almost daily. And that was always the point.