Examine source code of Suzune

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Suzune",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(114, 36, 198)",
      "toolbar_field": "rgba(255, 92, 92, 0.26)",
      "toolbar_field_text": "rgb(161, 20, 174)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(221, 252, 254)",
      "popup_text": "rgb(110, 54, 244)",
      "button_background_active": "rgba(255, 92, 92, 0.26)",
      "button_background_hover": "rgba(255, 92, 92, 0.26)",
      "icons": "rgb(128, 43, 136)",
      "sidebar_border": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgba(255, 92, 92, 0.26)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f27cd43-2df2-4bdc-b02b-bdb237203be2}"
    }
  }
}