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Protector is calling Firefox a CRAWLER.
This was the user agent
Firefox/18.0Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0
I know that new user agents are coming into being faster that the database can track it. Perhaps because it cannot find it, protector thinks its a baddie.
Not serious, just wanted to get it out there.