I'm testing a proxy. I would like to start a second instance of Firefox with command line arguments so that the session uses a HTTP Proxy. (The first instance of Firefox starts normally and runs without the proxy so I can bypass the proxy and directly contact the web).
Firefox has command line arguments, but they don't appear to include proxy information. But I'm not an expert on Firefox command line or other Firefox tricks.
Is it possible to run a second instance of Firefox from the command line with proxy information?