* browser.sessionstore.enabled (bool) - Activate the service. Default is true * browser.sessionstore.resume_from_crash (bool) - Resume sessions post-crash. Default is true. * browser.sessionstore.resume_session (bool) - Resume sessions always. Default is false. * browser.sessionstore.resume_session_once (bool) - Resume session at the next application start, but not again. Default is false.
You mean in firefox.js, right?
When you do this, please get rid of the DEFAULT_* variables and use getBoolPref directly on the prefBranch. *** This bug has been marked as a duplicate of 340895 ***