Firefox just shipped its toughest security upgrade yet. Version 150 patches 271 vulnerabilities uncovered by Anthropic’s Mythos Preview, a model so potent its creators handed early access only to a select few. Mozilla’s team, led by chief technology officer Bobby Holley, calls it a bootcamp for software. Every line of code now faces automated scrutiny that mimics—and surpasses—human experts. But this flood of flaws demands discipline. Resources. Grit. Bobby Holley puts it bluntly: “Our belief is that the tools have changed things dramatically, because now we have automated techniques that can cover, as far as we can tell, the full space of vulnerability-inducing bugs.” For years, Firefox relied on fuzzing and manual hunts. Attackers did the same, but only if they shelled out millions. No more. AI collapses that barrier. The collaboration started earlier with Claude Opus 4.6.…