Examine source code of Purple Pearl

{
  "name": "Purple Pearl",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1.png"
    },
    "colors": {
      "frame": "rgba(24, 9, 28, 1)",
      "tab_background_text": "rgba(234, 224, 203, 1)",
      "toolbar": "rgba(33, 13, 38, 1)",
      "bookmark_text": "rgba(234, 224, 203, 1)",
      "toolbar_field": "rgba(234, 224, 203, 1)",
      "toolbar_field_text": "rgba(24, 9, 28, 1)",
      "tab_line": "rgba(234, 224, 203, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6046163a-4093-4742-9c1a-e812051ca00d}"
    }
  }
}