AI Found 271 Hidden Flaws in Firefox. Here's Why That Matters.

Anthropic's AI system Claude discovered 271 security vulnerabilities in Firefox during a two-week audit, including 14 serious flaws. These represented one-fifth of all serious bugs Mozilla patched in 2025. Analysis: The sheer number suggests that traditional human-led security checks—even on widely used, publicly reviewed software—may miss significant problems. The finding raises a broader question: if established software still harbors hundreds of hidden flaws after years of review, what security gaps might exist in less scrutinized systems.