Mozilla: Anthropic's Mythos found 271 zero-day vulnerabilities in Firefox 150 CTO says new AI model is "every bit as capable" as world's best security researchers. https://arstechnica.com/ai/2026/04/mozilla-anthropics-mythos-found-271-zero-day-vulnerabilities-in-firefox-150/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social