Examine source code of Hacker's sensation

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Hacker's sensation",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 84, 14)",
      "toolbar_text": "rgb(67, 218, 85)",
      "frame": "rgb(14, 65, 21)",
      "tab_background_text": "rgb(24, 180, 51)",
      "toolbar_field": "rgb(38, 102, 47)",
      "toolbar_field_text": "rgb(67, 218, 101)",
      "tab_line": "rgb(67, 218, 114)",
      "popup": "rgb(7, 84, 22)",
      "popup_text": "rgb(24, 180, 59)",
      "tab_loading": "rgb(67, 218, 114)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{16a0dc88-f66e-4dae-aad7-5506cc5184e3}"
    }
  }
}