Examine source code of WhiskersAddon

{
  "manifest_version": 2,
  "name": "WhiskersAddon",
  "version": "1.0",
  "description": "Searches the web for new mentions of a keyword",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "MyCode.js",
        "jquery-3.6.3.min.js"
      ]
    }
  ],
  "id": "com.dusan.whiskersaddon",
  "browser_specific_settings": {
    "gecko": {
      "id": "{9b3b05a7-1791-4b55-879c-a04785b35690}"
    }
  }
}