Examine source code of mono smooth

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "mono smooth",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(26, 28, 29)",
      "toolbar_text": "rgb(218, 225, 225)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(218, 225, 225)",
      "toolbar_field": "rgb(7, 7, 7)",
      "toolbar_field_text": "rgb(218, 225, 225)",
      "tab_line": "rgb(218, 225, 225)",
      "popup": "rgb(7, 7, 7)",
      "popup_text": "rgb(218, 225, 225)",
      "tab_loading": "rgb(218, 225, 225)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4738f6b0-9a57-450d-87d0-991335219f68}"
    }
  }
}