Examine source code of Favorite (Vampire)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Favorite (Vampire)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(221, 100, 133)",
      "toolbar_text": "rgb(234, 173, 142)",
      "frame": "rgb(75, 93, 107)",
      "tab_background_text": "rgb(200, 171, 191)",
      "toolbar_field": "rgb(221, 100, 133)",
      "toolbar_field_text": "rgb(234, 173, 142)",
      "tab_line": "rgb(183, 201, 213)",
      "popup": "rgb(221, 100, 133)",
      "popup_text": "rgb(183, 201, 213)",
      "tab_loading": "rgb(183, 201, 213)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{538e4890-cd01-4882-8eca-78e6e0bf71ac}"
    }
  }
}