Cannot bookmark this URL

[George]

Why can't I bookmark this URL:
http://winsupersite.com/windows-10/prevent-windows-10-upgrade-installing-after-making-your-reservation

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 
Firefox/38.0 SeaMonkey/2.35

Thanks,
George
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