Examine source code of Alien Soup

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Alien Soup",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(29, 46, 57, 0.91)",
      "toolbar_text": "rgb(215, 253, 194)",
      "frame": "rgb(47, 57, 69)",
      "tab_background_text": "rgb(236, 254, 225)",
      "toolbar_field": "rgba(21, 24, 29, 0.57)",
      "toolbar_field_text": "rgb(231, 254, 217)",
      "tab_line": "rgb(180, 250, 148)",
      "popup": "rgba(29, 46, 57, 0.91)",
      "popup_text": "rgb(236, 254, 225)",
      "tab_loading": "rgb(180, 250, 148)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{925be56f-25c1-48b6-a739-5fc8e117cb4b}"
    }
  }
}