Introduction
Meta relies on WebRTC to power real-time audio and video across platforms like Messenger, Instagram, Cloud Gaming, and VR casting on Quest. But maintaining a permanent fork of this massive open-source project created a classic 'forking trap': internal modifications drifted far from upstream updates, making integration costly and risky. To break free, Meta engineered a dual-stack architecture that allowed safe A/B testing across over 50 use cases, eventually moving to a modular system built atop the latest upstream version. This article walks through the eight critical steps Meta took to modernize WebRTC, improve performance and security, and establish a continuous upgrade pipeline.
