Examine source code of DarkWMap

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "DarkWMap",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(56, 58, 58)",
      "toolbar_text": "rgb(231, 225, 227)",
      "frame": "rgb(17, 17, 17)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(11, 12, 12)",
      "toolbar_field_text": "rgb(235, 235, 241)",
      "tab_line": "rgb(85, 84, 85)",
      "popup": "rgb(30, 30, 31)",
      "popup_text": "rgb(225, 225, 231)",
      "tab_loading": "rgb(85, 84, 85)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{485bd859-93bd-474c-a32d-18228bdae150}"
    }
  }
}