Examine source code of Table Extractor

{
  "manifest_version": 2,
  "name": "Table Extractor",
  "description": "Copy tables from any webpage and save them as CSV, JSON, XML, HTML and XLSX files",
  "version": "1.0.7",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{13ae1f10-5973-4c46-b429-5ef0313ca0de}"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}