Vivaldi, now with added VPN
Vivaldi, now with added VPN

Privacy Without Compromise: Proton VPN is Now Built Into Vivaldi | Vivaldi Browser

Just found my Vivaldi update contained a little more than just bugfixes... it now has Proton VPN built in.
It's actually part of the browser, not an extension, so I'm in two minds whether I like that... or not.
You need either a Vivaldi account or a Proton account, so it's not completely anonymous, but it's a start.
The free-tier of Proton VPN also appears to be bandwidth limited and your exit point is randomised, so... yeah, it's ok...