Mozilla VPN uses Mullvad’s server network, but otherwise Mullvad is actually a lot better for privacy.
- Mozilla VPN doesn’t allow anonymous registration. Instead, you have to give them your email address.
- Mullvad allows payment with cash and Monero, Mozilla VPN doesn’t.
- At least the Mullvad Android app requires fewer permissions, and it doesn’t use any trackers compared to Mozilla VPN (4 permissions, no trackers vs. 13 permission, 2 trackers).
So, I would just choose Mullvad if I were to pick between these two.