Examine source code of Too sweet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Too sweet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(231, 231, 231, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0.75)",
      "toolbar_field_text": "rgb(156, 43, 0)",
      "tab_line": "rgb(255, 0, 102)",
      "popup": "rgb(255, 247, 245)",
      "popup_text": "rgb(66, 0, 136)",
      "ntp_background": "rgb(255, 232, 224)",
      "ntp_text": "rgb(149, 0, 59)",
      "popup_border": "rgb(212, 255, 0)",
      "toolbar_field_border": "rgb(192, 132, 255)",
      "tab_loading": "rgb(255, 0, 102)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8ba6fd03-bf99-42cd-badb-632d69d7ff2d}"
    }
  }
}