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Can't access some sites

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I'm getting the following with some websites since the most recent firefox update. It happens with outlook mail, facebook and my bank (and others) all of which I would expect to be up to date.. Secure Connection Failed

An error occurred during a connection to outlook.live.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

I'm getting the following with some websites since the most recent firefox update. It happens with outlook mail, facebook and my bank (and others) all of which I would expect to be up to date.. Secure Connection Failed An error occurred during a connection to outlook.live.com. PR_END_OF_FILE_ERROR Error code: PR_END_OF_FILE_ERROR The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem. Learn more…

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