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. Mozilla found and fixed 271 vulnerabilities in Firefox 150 while testing Mythos Preview—over ten times more than they found in Firefox 148 with Claude Opus 4.
by energy123 5mo ago
. Mozilla found and fixed 271 vulnerabilities in Firefox 150 while testing Mythos Preview—over ten times more than they found in Firefox 148 with Claude Opus 4.6;
- applfanboysbgon 5mo agoDid they allocate the same number of tokens to looking with Claude 4.6? Or did they find more because they looked more, owing to a special initative by Anthropic?
- deleted 5mo ago[deleted]
- properbrew 5mo ago> over ten times more than they found in Firefox 148 with Claude Opus 4.6 And how much with Opus 4.7? 5x?
- kllrnohj 5mo agoNo, not really. Mythos found 3 CVEs, not 271. https://www.flyingpenguin.com/mythos-mystery-in-mozilla-numbers-how-22-vulns-became-271-or-maybe-3-in-april/ https://www.flyingpenguin.com/mythos-mystery-in-mozilla-numb...
- moyix 5mo agoI think you're confusing CVEs and vulnerabilities here? Mozilla (per their longstanding practice) grouped multiple vulnerabilities found internally under a small number of CVEs.
- simonw 5mo agoThe Mozilla team responded to that argument here: https://hacks.mozilla.org/2026/05/behind-the-scenes-hardening-firefox/ https://hacks.mozilla.org/2026/05/behind-the-scenes-hardenin... - in the FAQ.