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Clearing cookies and site data

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When I clear the cookies and site data in the Privacy and security settings there always remains a 'rest' of 12.0 kb. Any idea what could be the cause?

When I clear the cookies and site data in the Privacy and security settings there always remains a 'rest' of 12.0 kb. Any idea what could be the cause?

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That is generated by your Browser there will always the data the browser loads that why your seeing that small kb of info.

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