Examine source code of Everything is Golden

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Golden star",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(198, 198, 198, 0.5)",
      "toolbar_text": "rgb(66, 66, 66)",
      "frame": "rgb(215, 187, 39)",
      "tab_background_text": "rgb(50, 50, 50)",
      "toolbar_field": "rgb(255, 249, 197)",
      "toolbar_field_text": "rgb(50, 42, 0)",
      "tab_line": "rgb(255, 229, 0)",
      "popup": "rgb(252, 255, 224)",
      "popup_text": "rgb(111, 67, 0)",
      "ntp_background": "rgb(233, 228, 190)",
      "ntp_text": "rgb(145, 98, 0)",
      "toolbar_field_highlight": "rgb(134, 130, 121)",
      "tab_loading": "rgb(255, 229, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b26245a4-0222-48d3-8215-15ae16702dac}"
    }
  }
}