The zero-days are numbered | The Mozilla Blog Since February, the Firefox team has been working around the clock using frontier AI models to find and fix latent security vulnerabilities in the browser We wrote previously about our collaboration with Anthropic to scan Firefox with Opus 4 6, which led to fixes for 22 security-sensitive bugs in Firefox 148
Mozilla says AI helped squash 423 Firefox security bugs Mozilla fixed 423 Firefox security bugs in April, a repair rate more than five times higher than the 76 fixes issued in March and almost 20 times higher than its 21 5 monthly average last year The browser maker previously said Anthropic's ballyhooed Mythos Preview model found 271 of these in Firefox 150
Mozilla uses Anthropics Mythos AI to uncover 271 bugs in . . . With Firefox 150, Mozilla says it has fixed 271 vulnerabilities identified not by fuzzers or human red-teamers, but by Anthropic's Mythos Preview model analyzing unreleased Firefox source code