Examine source code of Simply Dark Green

{
  "name": "Simply Green",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "green.jpg"
    },
    "colors": {
      "frame": "rgba(0, 99, 3, 1)",
      "tab_background_text": "rgba(19, 170, 19, 1)",
      "toolbar": "rgba(14, 82, 0, 1)",
      "bookmark_text": "rgba(245, 245, 245, 1)",
      "toolbar_field": "rgba(136, 255, 112, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(177, 255, 168, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f081085e-f6b6-4f9b-8910-726d34d3ee93}"
    }
  }
}