A small extensions which allow you to track the current song state and restore it after songbird exit.
It will restore position, and eventually pause if the track was paused.
There may be a delay between the pause set or the position set, this is due to asynchronous notification of playback events, but will be less than a second.
Feel free to comment/report bug in the comments.
Finally I would like to thanks guys who helped me on the songbird forum (Stevel, aushaus and Mook_sb). (Hope I've forgotten no one ;) )
Updated max version up to 1.9 (sorry guys, but I have no time to maintain this extension, but hopefully it still work). If someone is interested to work on it, he can get the sources by extracting the xpi.