Comment 18 for bug 1111808

"We will make a very bold, clear way for you to turn on and off network queries across ALL scopes for any given session in the dash. Think about this like the 'anonymous' mode in your browser. Toggle it, right there in the Dash, and you are totally certain you are not sending network traffic. We will aim to enforce this at the kernel level, hence the CC to Jamie S who leads our security team."

FYI, in thinking about this (for a while), I think I came up with a way to do this sanely that doesn't require a lot of coding effort. Approaching the scopes guys now (this may culminate into a UDS session, but I think it may not be that much work so it may not require a session.