firefox is vulenrable to Spoofing Attacks. The vulnerability exists due to obscured fullscreen notification issue by using a combination of window.open, fullscreen requests, window.name assignments, and setInterval calls which allows an attacker to perform unaothorized actions.
git://git.launchpad.net/ubuntu-cve-tracker/tree/active/CVE-2023-29533
bugzilla.mozilla.org/show_bug.cgi?id=1798219
bugzilla.mozilla.org/show_bug.cgi?id=1814597
www.mozilla.org/en-US/security/advisories/mfsa2023-13/#CVE-2023-29533
www.mozilla.org/security/advisories/mfsa2023-13/
www.mozilla.org/security/advisories/mfsa2023-14/
www.mozilla.org/security/advisories/mfsa2023-15/