Firefox source code customization to use cross domain policy without cors

We need an modification of a current firefox version (20+), that permits us=
 to use cross domain policy WITHOUT cors.

The preferable solutions would be to reactivate the netscape.security.Privi=
legeManager. (Please see attached test.html for testing)

If that isn=92t possible the alternative would be to get rid of the whole c=
rossdomain policy itself. (Please see attached test2.html for testing)

We have no clue how much effort is needed for any of these tasks, but we th=
ink it shouldn't be too complicated for anyone familiar with Firefox source=
 and C++ and will start with a fixed-price 100 USD offer. Please make perso=
nal proposal of budget and hours estimated if you have the feeling we under=
estimate this.

The resulting compiled Firefox version should run at least on Windows XP 32=
-bit, English or German language.