Examine source code of edge blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "edge blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-030-0f935cfde055600d01a959c5c15353de.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(13, 76, 127)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(17, 54, 87)",
      "tab_background_text": "rgb(199, 199, 199)",
      "toolbar_field": "rgb(17, 32, 44)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(57, 216, 247)",
      "popup": "rgb(7, 50, 84)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(57, 216, 247)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{be68aff2-6cf7-44c6-ad51-a8853b03d682}"
    }
  }
}