I am using iVPN in two ways, a system-wide application on devices where I have complete control over the network, and for other devices I use openvpn on a router which connects to iVPN servers. Of course any VPN provider can write anything in his help pages in order to fish for customers. On the iVPN site however, it is consistency in principles and policies which convinced me a few years ago. Since then ...
But no, I do not know about browser extensions. I would not want my browser to be taken care of, and have other apps emit my home IP into the wide open internet.