Question on adding some network-related features.

Hello!

I am interested in extending firefox so that it can bind to a specific
local IP address (and network interface on Linux, using SO_BINDTODEVICE).

I am also interested in adding c-ares support so I have better control
over DNS requests.

Are these features something that might be accepted upstream?

If so, are command-line arguments an acceptable way to allow
such configuration?

Thanks,
Ben