High impactReported
Fortune: Mozilla used Mythos to identify and patch 271 Firefox vulnerabilities
Fortune reported that Mozilla identified and patched 271 Firefox vulnerabilities using Anthropic's Mythos Preview model. Mozilla is not publicly named by Anthropic as a Glasswing launch partner but is consistent with the 40+ additional organizations extended access for critical software infrastructure.
Mozilla's 271-vulnerability patch run is the first named count of Mythos-assisted defensive output, demonstrating practical defensive utility for an open-source browser with hundreds of millions of global users.