Mozilla Reports Mythos AI Discovered 271 Security Vulnerabilities in Firefox 150

Mozilla used early access to Anthropic's Mythos Preview to pre-identify 271 security vulnerabilities in Firefox 150 before release, compared to only 22 found by previous AI models.

Vulnerabilities discovered through AI-powered source code analysis, representing potential attack vectors that could have been exploited if not pre-identified.

Firefox 150 browser release, with vulnerabilities spanning the complex browser codebase.

All 271 vulnerabilities were patched prior to Firefox 150 release. Mozilla CTO emphasized this demonstrates AI's defensive potential in cybersecurity.