I don't believe this is published anywhere handy but I'm taking a look.

Thanks Eve! I appreciate your help.

I found this list of servers for Mullvad:

* https://mullvad.net/en/servers/

Does Firefox VPN use these, or its own set of servers?

I believe we use the wireguard variants, but I'm not 100%

OK, thanks. Do you know where I might be able to find out for sure?

1. I opened the FPN and see the following servers available:

UK

1. * London
2. * Manchester

USA

1. * Atlanta, GA
2. * Chicago, IL
3. * Dallas, TX
4. * Denver, CO
5. * Los Angeles, CA
6. * Miami, FL
7. * New York, NY
8. * Piscataway, NJ,
9. * Salt Lake City, UT
10. * Seattle, WA

 Zurich, Switzerland
 Sweden

1. * Gothenburg
2. * Malmo
3. * Stockholm
4. Madrid, Spain
5. Singapore, Singapore
6. Belgrade, Serbia
7. Bucharest, Romania
8. Warsaw, Poland
9. Oslo, Norway
10. Auckland, New Zealand
11. Amsterdam, Netherlands
12. Chisinau, Moldova
13. Luxembourg, Luxembourg
14. Riga, Latvia
15. Tokyo, Japan
16. Milan, Italy
17. Dublin, Ireland
18. Budapest, Hungary
19. Hong Kong, Hong Kong
20. Frankfurt, Germany
21. Paris, France
22. Helsinki, Finland
23. Copenhagen, Denmark
24. Prague, Czech Republic

Canada

1. * Montreal
2. * Vancouver
3. Sofia, Bulgaria
4. Sao Paulo, Brazil
5. Brussels, Belgium
6. Vienna, Austria

Australia

1. * Melbourne
2. * Sydney

Thanks, but I was actually looking for a list of server hostnames (eg, vpn1.example.com or something) for whitelisting purposes.

Ah, we don't have that available unfortunately. The mullvad one might be a good place to start.