Examine source code of Space Meow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Space Cat",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(17, 6, 1, 0.57)",
      "toolbar_text": "rgb(255, 197, 159)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(251, 223, 205, 0.57)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(243, 187, 151)",
      "popup": "rgba(255, 197, 159, 0.65)",
      "popup_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(242, 248, 243)",
      "tab_loading": "rgb(243, 187, 151)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9e238a14-b3c2-4443-877f-d9e7a9a83f06}"
    }
  }
}