> As noted in the ingress, the web browser is the primary application.

In Firefox, about:networking and about:networking#dns are the http cache and dns cache. I have never considered writing values to these directly. Could there be a method for doing so within the developer console? Perhaps someone knows.

There are replies in the below link that touch on it for Chrome. The top suggestion, however, is using a socks 5 proxy server as a workaround. https://superuser.com/questions/184643/override-dns-in-firef...