With a use-case of "I'm paying a 3rd-party to secure my traffic", which matches what these "VPN" extensions claim to provide, then the answer is simply "Wherever the 3rd-party runs it".
With a use-case of "I'm paying a 3rd-party to secure my traffic", which matches what these "VPN" extensions claim to provide, then the answer is simply "Wherever the 3rd-party runs it".