Mozilla tackles high-severity bugs in its latest Firefox 72 and Firefox ESR 68.4 releases. A critical zero-day flaw, impacting both Firefox browsers, is a type confusion vulnerability in IonMonkey, the JavaScript Just-In-Time (JIT) compiler for SpiderMonkey. A successful attack could make it possible for attackers who successfully exploit it to abuse affected systems, according to Mozilla. The Firefox 72 release introduced new privacy features along with patching five high security bugs.
Source: https://threatpost.com/mozilla-releases-firefox-72/151636/