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
Tag: Firefox
Firefox 149 Ships: Patches for 37 Vulnerabilities, Including Multiple Sandbox Escapes
Mozilla released Firefox 149 on March 24, 2026, in one of the browser’s largest security updates in recent memory. The release fixes 37 vulnerabilities across memory corruption, sandbox escapes, use‑after‑free bugs, JIT miscompilation, and other issues that could enable remote code execution or privilege escalation. Given the number and seriousness of these fixes — 16 high‑severity issues among them —