Saving canvas generated image when saving post causes 404 error

As it happens it’s a Firefox issue – both classic Firefox and Firefox developer edition. Other browsers work fine. Why it threw me to 404 page of the web-site remains a mystery to me.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)