Mozilla used Anthropic’s Mythos Preview model to scan Firefox 150’s unreleased source code and flagged 271 security vulnerabilities before release. That’s a big jump from the 22 bugs found by Anthropic’s earlier Opus 4.6 model on Firefox 148, cutting out months of manual auditing.

The article discusses a recent supply chain attack involving the popular Axios package, highlighting how an attacker installed malware without altering the original code. It emphasizes the challenges posed by AI in both coding and attacking, as automated systems can easily introduce vulnerabilities faster than traditional security measures can respond.