Examine source code of Gameplay

{
  "name": "Gameplay",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt41.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(201, 148, 99, 0.66)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(11, 46, 50, 0.7)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 200, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{70578bab-223e-4c90-8808-7d9368bf719a}"
    }
  }
}