firefox is vulnerable to denial of service. A memory corruption and out of bounds write vulnerability exist when WebGL framebuffer is not initialized early enough.
bugzilla.mozilla.org/show_bug.cgi?id=1699077
security-tracker.debian.org/tracker/CVE-2021-23994
www.cisecurity.org/advisory/multiple-vulnerabilities-in-mozilla-firefox-and-thunderbird-could-allow-for-arbitrary-code-execution_2021-051/
www.mozilla.org/security/advisories/mfsa2021-14/
www.mozilla.org/security/advisories/mfsa2021-15/
www.mozilla.org/security/advisories/mfsa2021-16/