Tamper Data – Get this Extension for 🦊 Firefox (ja)Use tamperdata to view and modify HTTP/HTTPS headers and post parameters. Trace and time http response/requests. Security test web applications by modifying POST parameters. FYI current version of Google Web Accelerator is incompatible with the tampering function of TamperData. Your browser will crash. A few people have asked about donations. If you are so inclined, consider donating to the Toront
Fiddler HTTP Debugger - Fiddler
