Examine source code of Jungle Waterfall Animated

{
  "name": "Jungle Waterfall Animated",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "waterfall blue crop.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(199, 199, 199, 1)",
      "toolbar": "rgba(255, 255, 255, 0.35)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.7)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 0.5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4fef423-501b-47a0-877a-192d7d024f62}"
    }
  }
}