Examine source code of mapp

{
  "name": "mapp",
  "description": "Mapp features location search from current position. The purpose is to provide lightweight street view preview on map navigation. Click on the Google Map link for its action on the selected point for more rich detail.",
  "version": "2.0",
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js?0"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js?0",
        "leaflet.js",
        "jquery-3.4.1.min.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "gpl-1.0.txt?0",
    "popup.html?0",
    "page.html?0"
  ],
  "browser_action": {
    "default_icon": "default-64.png",
    "default_title": "mapp"
  },
  "incognito": "spanning",
  "options_ui": {
    "page": "./options.html?0"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "manifest_version": 2
}