Examine source code of Dark Color Stone

{
  "name": "Color Stone",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt138.png"
    },
    "colors": {
      "frame": "rgba(232, 245, 49, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.33)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(79, 79, 79, 0.42)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 0.48)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee5ff3be-9535-45ad-a675-24675915323c}"
    }
  }
}