It is. My wife came across it to make it easier to get certain apps for a relative's Firestick, but it works for basically all major platforms. For $2.49 per month for unlimited devices, I guess I can't go too wrong.
I use Private Internet Access. Although I think it may be limited to 10 devices, but it has a lot of features. The app is quite good (for whole device protection), but it also has browser extensions for Firefox and Chrome (I think). It's $40 per year if you purchase a 2-yr plan.
Although it appears you can whitelist websites with Surfshark (which PIA doesn't). I've found the occasional website - mostly banks - doesn't like VPN's.
The other thing to look out for is your network traffic between devices. If you can't whitelist the IP addresses or something similar, your inter-connectivity will slow to a crawl or break all together (i.e. wireless printing).