The TamperData Firefox Extension is a tool for tracking and modifying HTTP/HTTPS requests made by your browser.  You can use it to view and modify HTTP/HTTPS headers and POST parameters, which can be used to test the security and operation of websites.  Installation is easy.  Go to this link in Firefox, and click the Add to Firefox button.

TamperData lets you intercept requests before they are sent to web servers, so that you can modify cookies, referrers, or user-agent parameters as necessary before sending it on. You can even modify the Web server response before it is seen by the browser.  It is a great tool for testing and experimenting with web application security.  Click on the sample screenshot on the right to see an example of use.

Each Thursday, Security Musings features a security-related technology or tool.  Featured items do not imply a recommendation by Gemini Security Solutions.  For more information about how Gemini Security Solutions can help you solve your security issues, contact us!