Examine source code of Bear Mountain

{
  "name": "Bear Mountain",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Bear Mountain background.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ecff697-48e4-4e19-a825-7d8d7289bf2e}"
    }
  }
}