Firefox containers are great. I use them all of the time and if you pay to use mozillavpn you can even specify specific geographic locations to use as your VPN source on a per-container basis. Mozillavpn uses Mullvad VPN behind-the-scene. Mullvad is awesome by itself, but the beautifully integration of Containers+Mullvad made it worth the little extra $ that mozillavpn charges.