Sorry, not to be thick, but I'm not understanding how to do what you're suggesting?
I've launched my campaign in Chrome and in the left of the URL bar there is a padlock and a small yellow triangle. If I hover over the triangle it says 'View site information'. If I click that I get a drop down with two tabs. One says 'Connection' and the other 'Permissions'.
Under the 'Permissions' tab there is a list of things I can change permission for (Image, Javascript, Plugins, etc). None of them mentions content or fonts, so I'm confused as to what I should change.
I'm using 40.0.2214.111 on a Mac if you believe that makes any difference. Supposedly, the latest version.