Examine source code of Eye Saver Desert

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Eye Saver Desert",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(153, 85, 39)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(173, 97, 44)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 0)",
      "popup": "rgb(173, 97, 44)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(0, 0, 0)",
      "popup_border": "rgb(0, 0, 0)",
      "tab_text": "rgb(255, 255, 0)",
      "tab_loading": "rgb(255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e9c19c7-b6fc-4bdf-b0a7-edf8d373c5cb}"
    }
  }
}