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Proxy Setting Grayed Out

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I am using Windows 10 with Firefox 99.0 and I am trying to configure a Manual Proxy but my Proxy settings are all grayed out so I cannot even select Manual Proxy. I am logged in to my Firefox account. This happens both with and without VPN.

I am using Windows 10 with Firefox 99.0 and I am trying to configure a Manual Proxy but my Proxy settings are all grayed out so I cannot even select Manual Proxy. I am logged in to my Firefox account. This happens both with and without VPN.

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If you check the network.proxy prefs on the about:config page, do some have a lock icon at the far left ?

You can check what .js files are present in the "defaults\pref" folder in the Firefox program folder. The channel-prefs.js file that sets app.update.channel is a legitimate file in this folder, any other .js file is suspicious. You can open this other .js file in a plain text editor like Notepad and check what autoconfig.cfg file is referenced in the autoconfig.js file. There shouldn't be a autoconfig.cfg file present unless you've created it yourself to initialize some prefs.

  • pref("general.config.filename", "autoconfig.cfg");

See also:

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Yes. There is only one setting that has a lock icon and that is network.proxy.type. See attached screenshot. If this is the problem, how do I edit that setting?