Examine source code of Non-TOR Browser

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Non-TOR Browser",
  "manifest_version": 2,
  "description": "This is a \"warning\" theme to remind you when you are using Firefox VS the Secure Firefox browser provided by TOR.  Many times you get so occupied browsing that you forget you aren't using a proxy browser to protect your identity online.  This theme makes the two browsers look different."
}