Minion vs. Firefox Profiles

[qua]

I have multiple profiles defined in Firefox. Minion only works on my Windows machine if one particular profile is launched. (Minion on OSX doesn't appear to have this problem.) The particular profile in question is rarely the active one. It also happens to be the last one in the list.

Is there some way to change which profile is getting used or tell it stop using the browser for any purpose at all? Which jar is forcing the use of the web browser anyway?