Examine source code of Energy Fox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Energy Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(253, 237, 229)",
      "frame": "rgb(4, 4, 71)",
      "tab_background_text": "rgb(208, 208, 208)",
      "toolbar_field": "rgb(242, 242, 251)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(253, 237, 229)",
      "popup": "rgb(242, 242, 251)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(253, 237, 229)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b3ad5dc-91d1-4e6c-a5a7-7074088ddfcc}"
    }
  }
}