Examine source code of Ffx Grid Lines Animated

{
  "name": "Ffx Grid Lines Animated",
  "manifest_version": 2,
  "version": "7.0",
  "theme": {
    "images": {
      "theme_frame": "Render Cross on Grid Cyan persons_0-960.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(206, 127, 255, 1)",
      "toolbar": "rgba(103, 0, 140, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(206, 43, 255, 0.2)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 0.4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{835a462b-3c47-4e62-9bb0-7e64f5aacc33}"
    }
  }
}