Examine source code of Weekly World Inquisitor

{
  "theme": {
    "images": {
      "theme_frame": "WWI-firefox-persona-header.jpg"
    },
    "colors": {
      "frame": "#9e9b9b",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Weekly World Inquisitor",
  "manifest_version": 2,
  "description": "Weird, unexplained and out of this world"
}