I have been using NordVPN which has the ability to connect to an onion server. I've already managed to access onion addresses, in Chrome.
And FWIW, accessing onion address without Tor Browser offer less privacy since your browser have unique fingerprint.
At the risk of being slightly off-topic: I wouldn't use .onion sites on a normal browser through a third party. It has none of the benefits and all of the drawbacks of using Tor. Just
Download Tor Browser for this.
Not generating much offtopic, I just used this NordVPN function for testing purposes.
Now, in the case of Bitcoin Core, the IP that appears in the Tor connection option is already the same as the one used by the Tor browser, is that it?