All modelsMODEL / FRONTIER COVERAGEFirefoxTYPEModelSIGNALS5FIRST SEENSep 16, 2026LAST SEENNov 5, 2026ALSO KNOWN ASFirefox 159Recent signalsOpenAI says GPT-6 Cyber will first launch to a limited number of customers in its Daybreak Red program and has found 81+ "novel" vulnerabilities in Firefox (Djohnson/CyberScoop) Nov 5, 2026Firefox 159 fixes 167 security flaws, including 13 sandbox escapes Oct 28, 2026Firefox 158 adds AI form filling and fixes 77 security flaws Oct 14, 2026Firefox takes aim at the enterprise browser market Oct 13, 2026Mistral partners with Mozilla to power Firefox's AI browsing assistant, Smart Window, in the US, Canada, and France, with UK and Germany rollouts later in 2026 (Mauro Orru/Wall Street Journal) Sep 16, 2026RELATEDMozillaOpenAIGPT-6 CyberMistral AIAI cybersecurityALL MODELSLATEST SIGNAL