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"Proxy server is refusing connections" error message, fixed with Network Settings but won't save my preferences. Have tried everything!

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I always have to go Firefox>Option>Network>Settings>Select Auto-Detect Proxy Every time I open firefox.

I read the "Preferences Not Saved" Help but I don't have a User file in my Containing Folder, so I couldn't change that.

Deleted my prefs.js files, but when it automatically made a new one it was still stuck on "Manual Proxy Settings" which leads to the "Proxy server is refusing connections" error.

Any new ideas? Please?

I always have to go Firefox>Option>Network>Settings>Select Auto-Detect Proxy Every time I open firefox. I read the "Preferences Not Saved" Help but I don't have a User file in my Containing Folder, so I couldn't change that. Deleted my prefs.js files, but when it automatically made a new one it was still stuck on "Manual Proxy Settings" which leads to the "Proxy server is refusing connections" error. Any new ideas? Please?

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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).