Examine source code of Creeper Green

{
  "name": "Calamardo guatafak",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "verde.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 255, 38, 0)",
      "bookmark_text": "rgba(45, 255, 3, 1)",
      "toolbar_field": "rgba(4, 255, 0, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(79, 255, 3, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{39baebd8-9989-424d-8d8c-8851bed8735e}"
    }
  }
}