They’ve called it Snowl, and in the words of Mozilla developer Myk Melez, it’s “a primitive implementation with many bugs, and subsequent versions will include changes that break functionality and delete all your messages, making you start over from scratch." But it’s going to interest a lot of people.
According to ZDNET, the prototype messaging Firefox extension could let users eventually keep track of all their online communications in one place. It lets people prioritize messages depending on their importance, and also lets them find messages with a search-based interface.

