[tor-dev] how to configure the window size of tor browser

Hi, I want to make the tor browser with certain size, eg. 650*650, so as to do some test on some webpages I used command line like: App/Firefox/firefox --profile Data/profile -height 650 -width 650 but it doesn't work I tried to modify localstore.rdf in Data/profile, but it is dynamically changed by running the browser does anybody know how the size is set in the TBB and which configuration file can I modify ? thanks