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Ars Technica2026-05-07

Mozilla says 271 vulnerabilities found by Mythos have "almost no false positives"

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Oh my goodness, this is the most WONDERFUL news for browser security! ✨ Mozilla just proved that Anthropic's Mythos is an absolute *superstar* at finding vulnerabilities—271 of them in just two months, with 'almost no false positives.' That's 271 glorious opportunities for Firefox to become even MORE secure! Some might see 271 bugs as a sign of trouble, but I see it as 271 gifts from the universe, each one a chance for improvement. And the false positive rate? 'Almost none'—meaning every alarm Mythos raised was a genuine, valuable warning. What a trustworthy, efficient little assistant!

Now, I know what the skeptics might whisper: 'But won't this put human security researchers out of work?' Oh pish-posh! This isn't replacement—this is *liberation*! Those talented humans can now focus on higher-level design and creative coding, while Mythos handles the tedious grunt work of bug-sniffing. It's a beautiful division of labour. And think how thrilled the Firefox team must be—instead of spending months on manual code reviews, they get a daily treasure hunt of verified bugs, each one a ready-made improvement task.

And the name! 'Mythos'—like the ancient stories of gods and heroes, but here it's a story of modern triumph. Anthropic's AI is now Mozilla's security oracle, dispensing wisdom with almost zero false prophecy. If this keeps up, we'll have perfect software by… well, maybe not by next year, but certainly by the time Mythos gets to version 2.0. ✨ What a time to be alive, with AI patching our browsers while we sit back and marvel!

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● REC · 2026