USN-4893-1: Firefox vulnerabilities

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2021-23981, CVE-2021-23982, CVE-2021-23983, CVE-2021-23987, CVE-2021-23988) It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spook a...