Hi, Is there a reason why you want to downgrade from a lower version to an even lower version? You can do the downgrade yourself but I won't tell you where to get the link to it as I'd be telling you to go back to a old and unsupported version of Firefox and also because the link is easily searchable. Feel free to use the old unsupported and insecure versions of Firefox. Please however remember that puts your System and personal data at an increased risk. You may then wish to mitigate that by having well rehearsed bare metal restore strategies or using a virtual machine. * See also [[Install an older version of Firefox]]