Create Mullvad mar signing keys
To sign the Mullvad updates, we should create a primary and secondary mar signing keys, and put them in toolkit/mozapps/update/updater as release_primary.der and release_secondary.der.
To sign the Mullvad updates, we should create a primary and secondary mar signing keys, and put them in toolkit/mozapps/update/updater as release_primary.der and release_secondary.der.