Examine source code of Grey Mystic

{
  "name": "Grey Mystic",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt233.png"
    },
    "colors": {
      "frame": "rgba(102, 102, 102, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(97, 97, 97, 0.65)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(3, 3, 3, 0.62)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 149, 0, 0.43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b13251a5-311b-4d0b-b6a7-d3267188cb38}"
    }
  }
}