Examine source code of Doodle Eyes

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Doodle Eyes",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat-y"
      ]
    },
    "colors": {
      "toolbar": "rgb(96, 166, 183)",
      "toolbar_text": "rgb(20, 41, 68)",
      "frame": "rgb(76, 147, 158)",
      "tab_background_text": "rgb(0, 114, 164)",
      "toolbar_field": "rgb(196, 255, 247)",
      "toolbar_field_text": "rgb(53, 53, 68)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(65, 195, 200)",
      "popup_text": "rgb(53, 53, 68)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a0375cc-08a6-4799-8525-e87603fe35c0}"
    }
  }
}