Manually dragging and dropping an Outlook email message into the browser will trigger a page navigation when the message's mail columns are incorrectly interpreted as a URL. *Note: this issue only affects Windows operating systems with Outlook installed. Other operating systems are not affected.*. This vulnerability affects Firefox ESR < 60.2 and Firefox < 62.
Gentoo Linux Security Advisory 201810-1 - Multiple vulnerabilities have been found in Mozilla Firefox, the worst of which may allow execution of arbitrary code. Versions less than 60.2.2 are affected.