This would do it..
access-list inside deny tcp host 192.168.1.112 any eq 80
access-list inside deny tcp host 192.168.1.112 any eq 443
access-list inside permit ip any any
access-group inside in interface inside
That would prevent all web browsing, of course if you wanted to prevent any access to the internet...
access-list inside deny ip host 192.168.1.112 any
access-list inside permit ip any any
access-group inside in interface inside
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