Sometimes at work I need to do specific tasks through a very locked down proxy. At the moment I tend to keep a separate Firefox window with Firefox network settings, and the sites that I use through the proxy. But what I'd really like to be able to do is just apply the settings to that window. I believe Chrome has the option to open separate instances of the browser. Is there a similar option for Firefox? That way I could still look up information in a different window while having my proxy connection open for my work windows. I'm tired of toggling my network settings.