LJ Account Juggler от Holly M.

A port of the Chrome extension, LJ Account Juggler allows users to easily switch between multiple accounts on Livejournal-based websites. This addon is intended to replace the now-defunct LJLogin. A HUGE thank you goes out to the original developer of LJ Juggler for doing most of the heavy lifting to get this up and running!

LJ Juggler allows account switching on the following websites: Dreamwidth, Livejournal, InsaneJournal, and Scribbld.