Today, we began rolling out a new tool that gives people more control over the information businesses share with us. In this post, we describe how we redesigned the way our systems store and process off-Facebook activity information in order to implement these controls.

We are sharing how we designed Zoncolan, a static analysis tool that continuously scans more than 100 million lines of code to detect and prevent potential security issues. https://engineering.fb.com/security/zoncolan/