Manifest V3 Migration Pitfalls — Lessons from 17 Chrome Extensions

Manifest V3 Is Here — And It Broke Everything Google's Manifest V3 migration deadline has come and gone. After migrating 17 Chrome extensions from MV2 to MV3, I've compiled every pitfall, workaround, and lesson learned. If you're still migrating — or building new extensions — this guide will save you weeks of debugging. Pitfall 1: Service Workers Die Without Warning The problem: MV3 replaces persistent background pages with service workers. Service workers are terminated after ~30 seconds of ina