How? It downloads the most important extensions, and install it on your browser. The used extensions has been chosen by a survey among the information security community. Based on it's results, Firefox Security Toolkit was made. Also, it allows you to download Burp Suite certificate and a large user-agent list for User-Agent Switcher. Making it one-click away to prepare your web-application testing browser. How does it differs from well-known projects, such as OWASP Mantra and Hcon STF ? OWASP Mantra and Hcon STF are not regularly updated, and needs a lot of work in order to develop and maintain. Meanwhile, Firefox Security Toolkit does not need a additional maintaining, although I would be maintaining it for any issues/bugs if needed. The used extensions are downloaded from Mozilla Addons Store with its latest version, to ensure the best testing experience for the penetration tester. Who can use Firefox Security Toolkit...