Disabling automatic updates in newer versions of Firefox is not a trivial task.
Code:
mkdir /opt/firefox/distribution
echo '
{
"policies": {
"DisableAppUpdate": true
}
}
' > /opt/firefox/distribution/policies.json
You can use this in case of problems like the one reported here:
https://www.linuxquestions.org/quest...ml#post5957114
.