Examine source code of Sweets assorti

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sweets assorti",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(66, 66, 66, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(255, 90, 0)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(255, 76, 0)",
      "tab_line": "rgb(255, 124, 152)",
      "popup": "rgb(218, 255, 204)",
      "popup_text": "rgb(132, 0, 121)",
      "tab_loading": "rgb(255, 124, 152)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1e1ca7e-182a-4bf1-ae4c-041b24196444}"
    }
  }
}