Examine source code of Mountain Sunset

{
  "name": "Mountain Sunset",
  "manifest_version": 2,
  "version": "8.0",
  "theme": {
    "images": {
      "theme_frame": "firefox header2.png"
    },
    "colors": {
      "frame": "rgba(255, 127, 92, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(255, 133, 92, 0.47)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8fb7cddc-2968-45de-a423-ab3b5314a7a2}"
    }
  }
}