Mozilla VPN defaults to automatically launch and connect on startup for most users. You can confirm that this feature is enabled for you by following these steps:

Warning: Due to third-party limitations, some Android users may notice that Mozilla VPN won't automatically launch on startup. In these cases, manually connect it following the steps in this article.

Open Mozilla VPN.
Click the settings icon .
Click App preferences.
Make sure the box next to Connect VPN on startup is checked.
Warning: Due to device limitations, the connect on startup feature is not supported on iOS.