Вы должны распечатать путь, чтобы узнать, что запрашивает FF. Я почти уверен, что это favicon.ico, который запрашивается несколько раз (механизм повтора) из-за неверного формата, отправляемого примером Snoop.
редактировать. Я проверил это, и это действительно favicon, который запрашивается три раза:
Thread[New I/O server worker #1-3,5,main] - [id: 0x57c52e72, /0:0:0:0:0:0:0:1:63056 => /0:0:0:0:0:0:0:1:8080] RECEIVED: DefaultHttpRequest(chunked: false) GET / HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: keep-alive
Thread[New I/O server worker #1-3,5,main] - GET
Thread[New I/O server worker #1-3,5,main] - /
Thread[New I/O server worker #1-3,5,main] - [id: 0x57c52e72, /0:0:0:0:0:0:0:1:63056 => /0:0:0:0:0:0:0:1:8080] RECEIVED: DefaultHttpRequest(chunked: false) GET /favicon.ico HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 Accept: image/png,image/*;q=0.8,*/*;q=0.5 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: keep-alive
Thread[New I/O server worker #1-3,5,main] - GET
Thread[New I/O server worker #1-3,5,main] - /favicon.ico
Thread[New I/O server worker #1-3,5,main] - [id: 0x57c52e72, /0:0:0:0:0:0:0:1:63056 => /0:0:0:0:0:0:0:1:8080] RECEIVED: DefaultHttpRequest(chunked: false) GET /favicon.ico HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: keep-alive
Thread[New I/O server worker #1-3,5,main] - GET
Thread[New I/O server worker #1-3,5,main] - /favicon.ico
Thread[New I/O server worker #1-3,5,main] - [id: 0x57c52e72, /0:0:0:0:0:0:0:1:63056 => /0:0:0:0:0:0:0:1:8080] RECEIVED: DefaultHttpRequest(chunked: false) GET /favicon.ico HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: keep-alive
Thread[New I/O server worker #1-3,5,main] - GET
Thread[New I/O server worker #1-3,5,main] - /favicon.ico