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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