Proxy Authorization Required. Firefox does not ask for a proxy username and password

July 7, 2021 . 1 MIN READ

I managed to solve this one. Just set the following values to false in about:config.

  1. network.automatic-ntlm-auth.allow-proxies
  2. network.negotiate-auth.allow-proxies

Hope this helps someone out there :).

https://support.mozilla.org/en-US/questions/926378

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