Examine source code of Watchtower 7

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Watchtower 7",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(102, 156, 167)",
      "toolbar_text": "rgb(49, 41, 16)",
      "frame": "rgb(12, 72, 106)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(247, 247, 167)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "sidebar_border": "rgb(225, 225, 225)",
      "sidebar_highlight": "rgb(255, 255, 255)",
      "tab_loading": "rgb(247, 247, 167)",
      "sidebar": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(15, 15, 15)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c798b799-ebde-4f60-bd38-649af6aa24fb}"
    }
  }
}