Oh, I'm not saying that it's some sort of plot to force us to disable our extensions or anything. I'm saying it's going to be a feature aimed at out-of-the-box security, which advanced users are free to tinker with as they wish. The reality is unfortunately that many less-advanced users are much more likely to install random unvetted add-ons, and sane defaults for that list (pre-loading it with gov and bank domains) will prevent hostile add-ons from doing serious damage.