Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Firefox regressions (USN-4599-3)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4599-3 advisory. USN-4599-1 and USN-4599-2 fixed vulnerabilities in Firefox. The updates introduced various minor regressions. This update fixes the proble...