Examine source code of Dark-Bring back the Fox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark-Bring back the Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(201, 123, 19)",
      "frame": "rgb(41, 33, 16)",
      "tab_background_text": "rgb(238, 160, 56)",
      "toolbar_field": "rgb(63, 38, 4)",
      "toolbar_field_text": "rgb(255, 255, 0)",
      "tab_line": "rgb(186, 111, 13)",
      "popup": "rgb(82, 83, 84)",
      "popup_text": "rgb(224, 224, 228)",
      "tab_loading": "rgb(186, 111, 13)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e03b0a8e-fd88-46e4-ab00-6a9bd8b6952b}"
    }
  }
}