Examine source code of simple vee

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "simple eevee",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(34, 23, 13, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(56, 37, 21)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(56, 37, 21)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgba(34, 23, 13, 0.9)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60f97879-8477-4d4a-86c7-4beba341553c}"
    }
  }
}