extract regexp

[Bruce Ingalls <bingalls@CUT-this-SPAM-BLOCK.fit-zones.com>]

I am trying to read a server name from Mozilla's prefs.js into a variable.
The format of the string is

user_pref("mail.server.server1.hostname", "pop.server.com");

So the regular expression is something like
user_pref\\("mail\\.server\\.server1\\.hostname", "([^"]+)"\\);

How do I, for this case, read the file prefs.js, and load pop.server.com 
into
a variable, "my-server"?

Thanks ahead.