Examine source code of Montana

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxImage.jpg"
    },
    "colors": {
      "frame": "#0519f7",
      "tab_background_text": "#000003"
    }
  },
  "version": "2.0",
  "name": "Montana",
  "manifest_version": 2,
  "description": "Montana"
}