Examine source code of Rock Mountain

{
  "name": "Rock-mountain",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Rock-mountain.png"
    },
    "colors": {
      "frame": "rgba(42, 196, 157, 1)",
      "tab_background_text": "rgba(180, 69, 186, 0.84)",
      "toolbar": "rgba(171, 217, 203, 1)",
      "bookmark_text": "rgba(181, 114, 184, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cfe1c669-e49f-4aca-9ae1-c9e05ba2523b}"
    }
  }
}