There was a hotfix before the one that installed a new cert: > hotfix-reset-xpi-verification-timestamp-1548973•Complete > This study sets app.update.lastUpdat

There was a hotfix before the one that installed a new cert: > hotfix-reset-xpi-verification-timestamp-1548973•Complete > This study sets app.update.lastUpdateTime.xpi-signature-verification to 1556945257.