Examine source code of Chang Island

{
  "name": "Chang Island",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "oie_qqOPifmaHZFx.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(204, 37, 37, 0.49)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(222, 90, 224, 0.54)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(42, 209, 16, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{32b10e09-bd57-40eb-8053-0f0c3bf31da9}"
    }
  }
}