Examine source code of Mush

{
  "name": "Mush",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "mush.PNG"
    },
    "colors": {
      "frame": "rgba(232, 233, 235, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4df37562-0971-4d1b-ae4a-4cf22c967c72}"
    }
  }
}