Debug Small and Simple HTTP 1.0 Proxy

Hello, I need help with a super simple school project. Basically, I need a transparent HTTP 1.0 Proxy. It will redirect any traffic back to the client. That proxy will parse HTTP headers for Content-Type: image/. If the content-type is an image, output to a file: ClientIP; User-Agent; RemoteIP; RemoteHost; ContentURI; FileLength; Timestamp That's pretty much it. I have included a file. It's what I have already done. It pretty much works in Google Chrome - except it doesn't work in Firefox Portable ([login to view URL]).