Examine source code of Cyber-Gerbil

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cyber-Gerbil",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-006-51ab495c5f5dde6a3cddb22484acd00d.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(114, 126, 132)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(54, 67, 70)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(55, 73, 82)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 103, 0)",
      "popup": "rgb(54, 67, 70)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 103, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{071e01e1-f828-4ad7-b1aa-7ebb69d09c68}"
    }
  }
}