Description
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing.
Solution(s)
mozilla-firefox-esr-upgrade-91_3
Referenceshttps://attackerkb.com/topics/cve-2021-38506 CVE - 2021-38506 http://www.mozilla.org/security/announce/2021/mfsa2021-49.html