CVE ID:	CVE-2020-15680
Description:	If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-15680 https://bugzilla.mozilla.org/show_bug.cgi?id=1658881 https://bugzilla.mozilla.org/show_bug.cgi?id=1658881 https://www.mozilla.org/security/advisories/mfsa2020-45/ https://www.mozilla.org/security/advisories/mfsa2020-45/