Examine source code of Overleaf Font Switcher

{
  "manifest_version": 3,
  "name": "Overleaf Font Switcher",
  "version": "1.0.1",
  "description": "Change the Overleaf editor font to any font installed on your system.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Overleaf Font Switcher",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.overleaf.com/project/*",
        "*://overleaf.trit.au.dk/project/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "overleaf-font-switcher@madselkjaer",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}