Examine source code of Falling Green

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Falling Green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-043-dfcec5f93f7a29f97b030eda45530203.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 248, 199)",
      "toolbar_text": "rgb(224, 0, 255)",
      "frame": "rgb(33, 148, 217)",
      "tab_background_text": "rgb(244, 255, 0)",
      "toolbar_field": "rgb(7, 248, 199)",
      "toolbar_field_text": "rgb(32, 47, 66)",
      "tab_line": "rgb(244, 255, 0)",
      "popup": "rgb(191, 223, 247)",
      "popup_text": "rgb(4, 45, 255)",
      "tab_loading": "rgb(244, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d811257-a8b8-45fa-8541-4c2cce99f117}"
    }
  }
}