Examine source code of Dragon Age

{
  "name": "Dragon Age",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Kirkwall_concept_art_2_firefox_art.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(214, 214, 214, 0.51)",
      "toolbar": "rgba(194, 194, 194, 0.23)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(217, 217, 217, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.57)"
    }
  }
}