Examine source code of Grid Lines Animated

{
  "name": "Grid Lines Animated",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "Render-Grid-Personas_0-989.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(206, 127, 255, 1)",
      "toolbar": "rgba(89, 0, 130, 0.3)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.4)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 0.3)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a525da5f-f850-4d21-add8-c3ddf4e08509}"
    }
  }
}