Is their VPN provided by some other company?
Mozilla has run its own vpn for a while now
https://www.mozilla.org/en-US/products/vpn/
>Mozilla has partnered with Mullvad in order to utilize our global network of VPN servers for its own VPN application.
https://mullvad.net/en/blog/mullvad-partnerships-page-has-be...
(2019). Are you saying that has changed?
The T&Cs of the current VPN still say Mullvad provides the service.
https://www.mozilla.org/en-US/about/legal/terms/subscription...