[Project_owners] Initialising an extension once per session

[Brian King]

Myk Melez wrote:
> If you want to wait until session store is finished restoring windows 
> and tabs, you can observe the sessionstore-windows-restored 
> notification.  A variety of other startup notifications are also available:
> 
> http://developer.mozilla.org/en/docs/Observer_Notifications#Application_startup 

Ah, this looks like something I could use. Thanks everyone for the 
suggestions.

- Brian