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Programatically change proxy settings from an external application

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Using pref.js or a pac file suggests that firefox will only load settings when it opens. I would like to manipulate settings from an external program, and have firefox reload them instantly when I change them.

I have an external application and with it i want to change proxy settings and have firfox use them instantly.

Can this be accomplished? From the registry maybe...?

Using pref.js or a pac file suggests that firefox will only load settings when it opens. I would like to manipulate settings from an external program, and have firefox reload them instantly when I change them. I have an external application and with it i want to change proxy settings and have firfox use them instantly. Can this be accomplished? From the registry maybe...?

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I have this same problem....has anybody come up with a solution? Are there other browsers that will automatically update the proxy settings?