also adds a pref in Navigator > Downloads to set the behavior when starting a download (open DM, open progress dialog, open nothing). r=hewitt sr=ben a=asa git-svn-id: svn://10.0.0.236/trunk@232003 18797224-902f-48f8-a5cc-f745e15eee43
also adds a pref in Navigator > Downloads to set the behavior when starting a download (open DM, open progress dialog, open nothing). r=hewitt sr=ben a=asa git-svn-id: svn://10.0.0.236/trunk@232003 18797224-902f-48f8-a5cc-f745e15eee43