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…
Firefox
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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…