The Day AI Argued With MDN (And Lost)

AI coding assistants have changed how we write software. They generate components, explain APIs, write tests, and even review pull requests. But there's still one area where they regularly fail: knowing what's actually supported in browsers today. Mozilla recently demonstrated this problem in a surprisingly direct way. While testing Claude Code on recently released Firefox features, they found that the model confidently claimed Firefox didn't support the Web Serial API—and that Mozilla wasn't e...