This update for MozillaFirefox fixes the following issues: - Firefox was updated to 78.9.0 ESR * CVE-2021-23981: Texture upload into an unbound backing buffer resulted in an out-of-bound read * CVE-2021-23982: Internal network hosts could have been probed by a malicious webpage * CVE-2021-23984: Malicious extensions could have spoofed popup information * CVE-2021-23987: Memory safety bugs