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Secure connection failed

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I cannot access the youtube website and other websites as well due to secure connection failed. how can I fix this? I'm really confused and I'll really appreciate your response because other websites are related to my online classes.

I cannot access the youtube website and other websites as well due to secure connection failed. how can I fix this? I'm really confused and I'll really appreciate your response because other websites are related to my online classes.

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In case this is a problem with a proxy server, could you change this setting:

  • Windows: "3-bar" menu button (or Tools menu) > Settings (previously "Options")
  • Mac: "3-bar" menu button (or Firefox menu) > Preferences
  • Linux: "3-bar" menu button (or Edit menu) > Preferences
  • Any system: type or paste about:preferences into the address bar and press Enter/Return to load it

In the search box at the top of the page, type proxy and Firefox should filter to the "Settings" button, which you can click.

Switch to "No proxy", then click the OK button at the bottom.

For reference, the default of "Use system proxy settings" piggybacks on your Windows/IE "LAN" setting. "Auto-detect" can lead to a flaky connection.

Any difference?