Overview
- Mozilla says Firefox 148 ships with fixes for 14 high-severity bugs that resulted in 22 CVEs.
- Anthropic’s Frontier Red Team used Claude to find issues in Firefox’s JavaScript engine and across the codebase.
- The reports included minimal reproducible tests, allowing Mozilla’s engineers to verify issues and land patches within hours.
- Beyond the security-sensitive findings, Anthropic identified roughly 90 additional bugs, most of which Mozilla reports are now fixed.
- Mozilla reports the AI method surfaced logic errors that fuzzing had missed and says it has begun integrating AI-assisted analysis into routine security workflows.