Examine source code of Pixel Art Blue Clouds

{
  "name": "Blue Clouds",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "11 longe final 3.png"
    },
    "colors": {
      "frame": "rgba(70, 142, 235, 1)",
      "tab_background_text": "rgba(61, 81, 128, 1)",
      "bookmark_text": "rgba(61, 81, 128, 1)",
      "toolbar_field_text": "rgba(61, 81, 128, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1f75845-ec60-4319-b6f9-b06af1007e64}"
    }
  }
}