Most of today's efforts towards securing web applications rely on securing the web server and providing users with web pages which are protected against common weaknesses over a secure channel. However, we often forget that web applications are client-server applications where the client is the web browser. Therefore, accessing a website is not safe as long as the web browser cannot be trusted. How many web browsers do we use in a week or a month? Are those web browsers exposed to attacks? Do we trust our favourite web browsers? We will discover multiple attack scenarios and attack vectors which can endanger our browsing experience. Be warned, your relationship with your favourite web browser might suffer and trust issues might arise.