Examine source code of WLFGRL

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "WLFGRL",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 31, 22)",
      "toolbar_text": "rgb(208, 85, 65)",
      "frame": "rgb(19, 21, 16)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(19, 21, 16)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(208, 85, 65)",
      "popup": "rgb(19, 21, 16)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(208, 85, 65)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a68d7abe-0233-4b5c-9dcc-a897364c223b}"
    }
  }
}