Looks like this feature is broken on the mac. See
http://bugzilla.mozilla.org/show_bug.cgi?id=80363 for details.
David Goldman wrote:
> I'm using mozilla 0.9.2 on mac os X; I'm not sure if this is an os X
> specific problem, but I suspect not. I'm a student at UC Berkeley; to
> access online resources like encyclopedias, journal databases, etc.,
> from my non-campus ISP I use the campus proxy service which requires
> automatic proxy configuration. I was excited to see the automatic proxy
> config field in the mozilla preferences; but when I tried to get it to
> work I couldn't. When I hit the reload button in the prefs dialog
> nothing happened, and I saw no network traffic. So the app wasn't doing
> anything. And when I quit the program with the proxy config url saved
> and try to start up mozilla again before anything loads I get an
> "application unexpectedly quit" error.
> Does anyone know if this feature is missing from mozilla, or broken,
> or if there are any plans to support it in the future? At the present
> time I have to start up netscape 4.76 in classic or os 9.1 to get
> automatic proxy config support and do research, which is a bit of a
> pain. Thanks.
> -Dave
>
