Examine source code of Dog by Brainboost

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dog by Brainboost",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "Dog0.png",
        "Dog1.png",
        "Dog2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "right center",
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 2, 13, 0.01)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0.01)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 0, 0, 0.01)",
      "popup": "rgb(57, 0, 3)",
      "popup_text": "rgb(219, 226, 215)",
      "tab_loading": "rgba(0, 0, 0, 0.01)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0beb7e0b-5df7-4381-9428-9d6673da9675}"
    }
  }
}