Examine source code of The Light From Above

{
  "name": "The Light From Above",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "LightFromABoveH.jpg"
    },
    "colors": {
      "frame": "rgba(1, 31, 56, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(1, 29, 56, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(1, 29, 56, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{02367440-a5c6-4b64-a7b3-b6d39076d79d}"
    }
  }
}