force firefox to use a specfic profile

I have setup 2 profiles, 1 for work and 1 for private at home and I have this issue when clicking on links outside firefox as for example apps like MS outlook and shortcuts and such firefox profile manager pops up and ask me to chose a profile to show the link in, and I cannot chose the already running profile but must then chose the work profile if Im currently using "private". So my question is how do I force FF from stop asking which profile to open an external link in and set the default profile? My profiles.ini looks like this currently: [General] StartWithLastProfile=0 [Profile0] Name=Work IsRelative=0 Path=D:\Firefox Profiles\work Default=1 [Profile1] Name=Private IsRelative=0 Path=D:\Firefox Profiles\private Thanks a bunch! :-)