How I AI

How Claude Mythos found a 15-year-old bug in Mozilla Firefox | Brian Grinstead

June 22, 2026·48 min·5-min readinterviewtechnology
Podzilla Summary (5 min)
TLDR
Mozilla Firefox used a custom-built AI agent harness with tools like the Claude Agent SDK to discover and help fix nearly 500 security bugs in a single month, not because of a magical new model alone, but due to a well-designed, iterative, and verifiable agentic workflow that prioritizes

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Guest

B

Brian Grinstead

interview on How I AI

Mentions

Books, people, and resources mentioned in this episode.

People

Brian Grinstead

Companies

Mozilla FirefoxAnthropic

Products & Tools

Claude Agent SDKCloud CodeRLbox

Topics

Api DesignArtificial IntelligenceCybersecurityDevopsOpen SourceSoftware EngineeringTech Industry

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