Mozilla Used Anthropic’s Mythos to Find and Fix 151 Bugs in Firefox

Mozilla said Firefox 150 includes fixes for 271 vulnerabilities found with Anthropic’s Mythos Preview.

The company said the tool significantly improved bug discovery beyond traditional fuzzing and manual review.

The case suggests advanced AI could speed up vulnerability discovery for both defenders and attackers.

That raises pressure on major software projects to harden code before such tools become widely available.