Examine source code of FileFox

{
  "name": "FileFox",
  "short_name": "FileFox",
  "version": "0.6.0.1",
  "manifest_version": 2,
  "default_locale": "pl",
  "description": "__MSG_extDescription__",
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "browser_action": {
    "default_icon": "img/icon48.png",
    "default_title": "FileFox",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "alarms",
    "notifications",
    "webNavigation",
    "contextMenus",
    "https://filefox.pl/*"
  ],
  "background": {
    "scripts": [
      "js/jquery-3.5.1.min.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery-3.5.1.min.js",
        "js/content.js"
      ],
      "css": [
        "css/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "img/*",
    "css/*",
    "fonts/*",
    "js/*"
  ],
  "applications": {
    "gecko": {
      "id": "jid1-eVzlCckL1D1yHw@jetpack"
    }
  }
}