Examine source code of SpyroDarkPassage

{
  "name": "SpyroDarkPassage",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "backgroundpreview2.jpg"
    },
    "colors": {
      "frame": "rgba(80, 70, 97, 0)",
      "tab_background_text": "rgba(230, 230, 230, 0.83)",
      "toolbar": "rgba(0, 0, 0, 0.2)",
      "bookmark_text": "rgba(224, 224, 224, 0.85)",
      "toolbar_field": "rgba(0, 0, 0, 0.35)",
      "toolbar_field_text": "rgba(245, 245, 245, 0.94)"
    }
  }
}