Examine source code of Friendly Frogs

{
  "name": "Friendly Frogs",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "FriendlyFrogsH.jpg"
    },
    "colors": {
      "frame": "rgba(120, 143, 67, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(129, 140, 71, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(122, 133, 68, 0.1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{805f4e78-3c65-4cf4-9e11-9338da4b0a60}"
    }
  }
}