Examine source code of Table to Excel

{
  "manifest_version": 2,
  "version": "3.4",
  "name": "Table to Excel",
  "description": "Saves HTML tables to an Excel spreadsheet.",
  "web_accessible_resources": [
    "images/icon.addressbar.gif",
    "images/icon.addressbar.19.gif",
    "images/loader.gif"
  ],
  "default_locale": "en",
  "icons": {
    "128": "images/icon.png"
  },
  "background": {
    "scripts": [
      "js/Config.js",
      "js/TableUtil.js",
      "js/background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "file:///*",
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/lib/Blob.js",
        "js/lib/FileSaver.js",
        "js/lib/jszip.js",
        "js/lib/xlsx.js",
        "js/Config.js",
        "js/Clipboard.js",
        "js/TableWrapper.js",
        "js/ExcelUtil.js",
        "js/TableUtil.js",
        "js/TableManager.js",
        "js/TableShow.js",
        "js/DetachedTableShow.js",
        "js/contentscript.js"
      ],
      "css": [
        "css/table.capture.css",
        "css/table.display.css"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "contextMenus",
    "clipboardWrite"
  ],
  "page_action": {
    "default_icon": {
      "19": "images/icon.addressbar.19.gif"
    },
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "{3602c84f-cc0a-4bb2-a357-f533cc6b24fb}",
      "strict_min_version": "42.0"
    }
  }
}