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Firefox will not allow me to log into certain websites

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When I try to log into Twitch.tv or Netflix I get an error saying that the browser is not supported. When I hit F12 on my Windows computer to view the console for the browsing session, Twitch.tv is giving a 400 error. I have attached the text from that error. I already contacted Twitch and they said the problem was my browser, not their platform. I have attached an image of the connection error.

Here are some things I have tried to fix it:

  • cleared all data from the browser including cache and cookies
  • tried private session browsing and it still did not allow me to log into Twitch or Netflix
  • deleted all addons and extensions
  • disabled my antivirus and windows firewall
  • used a different DNS server and tried an automatically set DNS, still doesn't work.
  • reinstalled Firefox
When I try to log into Twitch.tv or Netflix I get an error saying that the browser is not supported. When I hit F12 on my Windows computer to view the console for the browsing session, Twitch.tv is giving a 400 error. I have attached the text from that error. I already contacted Twitch and they said the problem was my browser, not their platform. I have attached an image of the connection error. '''Here are some things I have tried to fix it:''' * cleared all data from the browser including cache and cookies * tried private session browsing and it still did not allow me to log into Twitch or Netflix * deleted all addons and extensions * disabled my antivirus and windows firewall * used a different DNS server and tried an automatically set DNS, still doesn't work. * reinstalled Firefox
Attached screenshots

All Replies (1)

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If you can't log in to websites after removing the cookies associated with it, clearing your Firefox cache, and trying with your extensions and plugins disabled, and having checked security software, you may have a corrupt cookies file in your Firefox profile folder.

Regards, Will