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Why http://www.yahoo.co.jp/ connection is not secure

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As unable to add screen shots I have deleted the question. I wish in Edit there should an option to delete the question if wanted.

Great work Firefox keep doing.

Thank you.

As unable to add screen shots I have deleted the question. I wish in Edit there should an option to delete the question if wanted. Great work Firefox keep doing. Thank you.

Modified by Ari94

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Firefox has different styles of connection error pages. If you get the page with an "Advanced" button, could you click the button, then copy/paste the technical information in that section include the code?

Probably the most common code is covered in this article:

How to troubleshoot security error codes on secure websites