The Markup, a nonprofit newsroom that investigates how the world’s most powerful institutions use technology to reshape society, today announced the development of The Citizen Browser Project—an initiative designed to measure how disinformation travels across social media platforms over time.

At the center of The Citizen Browser Project is a custom web browser designed by The Markup to audit the algorithms that social media platforms use to determine what information they serve their users, what news and narratives are amplified or suppressed, and which online communities those users are encouraged to join. Initially, the browser will be implemented to glean data from Facebook and YouTube.