Anthropic’s Claude found 22 vulnerabilities in Firefox over two weeks

Automated excerpt

Anthropic’s team used Claude Opus 4. 6 over the span of two weeks, starting in the JavaScript engine and then expanding to other portions of the codebase. According to the post, the team focused on Firefox because “it’s both a complex codebase and one of the most well-tested and secure open-source projects in the world. ” Notably, Claude Opus was much better at finding vulnerabilities than writing software to exploit them. The team ended up spending $4,000 in API credits trying to concoct proof-of-concept exploits, but only succeeded in two cases.

Selected automatically from source text; not independently written or fact-checked. Read the original for full context.