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Firefox finds a slew of new bugs with Claude's help
Anthropic's AI model Claude Opus 4.6 identified 22 vulnerabilities in Firefox, including 14 high-severity bugs, most fixed in the February Firefox 148 release.
- On March 6, 2026, Anthropic disclosed it discovered 22 Firefox vulnerabilities, including 14 high-severity flaws, after approaching Mozilla several weeks earlier.
- Anthropic began work several weeks ago when it approached Firefox's team to run Claude Opus 4.6 over two weeks, starting in the JavaScript engine and expanding across the codebase.
- Using Claude Opus 4.6, Anthropic's team spent $4,000 in API credits crafting proof-of-concept exploits and found Claude was better at spotting vulnerabilities than writing exploits.
- Most fixes appeared in Firefox 148 released this February, with a few waiting for the next Firefox release, and engineers began landing fixes within hours.
- The episode positions AI as both a useful tool and a potential risk, with researchers warning that safeguards are needed if models narrow the exploitation gap, and Anthropic acknowledged it may not last long.
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25 Articles
25 Articles
Anthropic says it found a heap of Firefox security flaws using new Claude tools, says 'AI is making it possible to detect severe security vulnerabilities at highly accelerated speeds'
Claude finds 14 high-severity Firefox bugs in just a few weeks, rivaling what Mozilla could do in months.
·United Kingdom
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Mozilla says Claude AI uncovered over 100 Firefox bugs in just two weeks, including 14 high-severity flaws
Mozilla is now working with Anthropic's Frontier Red Team to identify and patch potentially dangerous security vulnerabilities in Firefox. According to Mozilla, the AI company approached them a few weeks ago with results from a newly developed, AI-assisted bug-hunting method. The approach appears to work, Mozilla said, and could ultimately...Read Entire Article
Mozilla confirmed a strategic collaboration with Anthropic that enabled the identification and correction of tens of vulnerabilities in Firefox. The IA company used Claude to detect 14 critical errors in...
·Portugal
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Coverage Details
Total News Sources25
Leaning Left1Leaning Right1Center4Last UpdatedBias Distribution67% Center
Bias Distribution
- 67% of the sources are Center
67% Center
L 17%
C 67%
R 16%
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