> How does Mozilla handle my data?

> We collect technical data needed to provide, maintain, and ensure the performance and stability of the service, as well as interaction data to understand usage of the feature and help guide improvements. For example, we may log whether a connection succeeded or failed, or record that 2 GB of data was used on a certain day.

> Importantly, VPN never logs the websites you visit or the content of your communications.

Also they have a paid one that's separate service