Rated 4 out of 5 stars

Here's the skinny. I deleted the current, re-downed it again, re-registered again and it worked. Make sure when you go to trashmail.net, if you're not blocking scripts (like NoScript add-on), then you'll see the window for the free option with two tabs for "Quick" and "registration". fill'em out and presto! its working for me again.

This review is for a previous version of the add-on (2.0.4.1-signed).