Examine source code of Minecraft Wiki

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Minecraft Wiki",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 0, 255, 0)",
      "toolbar_text": "rgb(238, 238, 238)",
      "frame": "rgb(48, 48, 48)",
      "tab_background_text": "rgb(238, 238, 238)",
      "toolbar_field": "rgb(35, 35, 36)",
      "toolbar_field_text": "rgb(245, 245, 245)",
      "tab_line": "rgba(145, 145, 145, 0.5)",
      "popup": "rgb(44, 44, 45)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(85, 85, 85)",
      "tab_selected": "rgba(140, 140, 141, 0.5)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.3)",
      "toolbar_field_border": "rgba(144, 144, 144, 0.6)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgba(145, 145, 145, 0.5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{52710933-d7d7-498c-814a-d5d9b1e3ec0d}"
    }
  }
}