How Mozilla Used Mythos to Find 271 Firefox Vulnerabilities — and What It Means
Mozilla says it used Anthropic’s Mythos model, together with a custom agent harness, to uncover 271 security issues in Firefox over roughly two months. The disclosure, supported by a small set of public Bugzilla reports, highlights a workflow that pairs large language models with deterministic tooling and verification to reduce hallucinations and produce actionable test cases — but it has also reignited debates about hype, disclosure practices, and the shifting…