Examine source code of Forest Mage

{
  "name": "Forest Mage",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Forest Mage.png"
    },
    "colors": {
      "frame": "rgba(128, 130, 109, 1)",
      "tab_background_text": "rgba(242, 226, 172, 1)",
      "toolbar": "rgba(131, 133, 112, 0)",
      "toolbar_field": "rgba(131, 133, 112, 0)",
      "toolbar_field_text": "rgba(136, 209, 121, 1)",
      "tab_line": "rgba(250, 223, 105, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{87504ddc-7af2-4e32-a4ba-72ebbe55f579}"
    }
  }
}