From article:
If you have the Brave Browser installed on your Windows devices, then you may also have Brave VPN services installed on the machine. Brave installs these services without user consent on Windows devices.
More reason to ditch the crypto bro browser.
Well, you have two options. The same developer of thorium does have a Firefox one and it's called mercury. Blazing fast, too. Or you can install adblock detection bypass extension on thorium. It is an extension that's made to work with chrome alongside ublock origin to bypass YouTube adblock detection. In fact, I literally just ran into that issue today and the other extension fixed it.