Examine source code of Crystal shine

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Crystal shine",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 42, 91, 0.5)",
      "toolbar_text": "rgb(136, 255, 225)",
      "frame": "rgb(138, 202, 255)",
      "tab_background_text": "rgb(114, 72, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(200, 242, 255)",
      "popup": "rgb(221, 250, 255)",
      "popup_text": "rgb(0, 35, 162)",
      "tab_loading": "rgb(200, 242, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{49e8e1cc-d388-49b6-a49e-6bff57c1ba24}"
    }
  }
}