(#1) Clickjacking 🦊 And headers to the rescue

Imagine you are building your amazing website... it has all the great features that make the users happy. They are using it and believe they are fully safe to make the most of it. But someday... You discover that your system is vulnerable to CLICKJACKING! - "Bartosz! What does it mean?!" - "Reader... Look below." Scary, right? The problem is that clickjacking is a real issue... Here is how it works: A user visits some other (evil) website that has some encouraging button to click (like "You...