Firefox Relay Premium makes it easy to create email masks, randomly generated email addresses that forward to your real inbox. Use it to protect your online accounts - and your identity - from hackers.
Firefox Relay Website is synced once a day between localized and the core repo. To test your localization, you need to download the build at https://github.com/mozilla/fx-private-relay/releases. Click on the Assets arrow, and you should see two files. download the appropriate compressed file to your machine. To download the latest l10n build, click on the Tags button (next to the Release button), the latest build is on the top.