Comodo freeware reports TCP listening on two (seemingly random) ports

It is pretty normal behavior for Firefox, same as for Thunderbird and for plenty of other programs.

My FF have always 2-32 local FF2FF connections, same as TB has 2 local TB2TB connections.

If process is listening on localhost ( 127.0.0.1 ) interface, nothing but local processes can connect to it.

Imagine it as you extra network card, that is available only to programs running on your PC.

If you monitor connections by sysinternals TCPview utility, always notice yourself what interface IP address a process is listening on.

A typo, should be 2-3, not 2-32

As far as I can tell, it's the communication between 'XULRunner' and the application, in this case Firefox.

Because Firefox has 'XULRunner' built into the package, you can use it to run other applications. e.g.

Firefox.exe -app path\to\application.ini

One such application is 'sqlite-manager'

Just my 2 pence worth, but really only a guess.