Examine source code of Overleaf Layout Switch

{
  "manifest_version": 3,
  "name": "Overleaf Layout Switch",
  "version": "0.1.0",
  "description": "Adds a toolbar button to swap Overleaf layout to: PDF | Editor | Sidebar",
  "permissions": [],
  "host_permissions": [
    "https://www.overleaf.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.overleaf.com/project/*",
        "https://www.overleaf.com/latex/project/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "512": "/icons/icon-512x512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "overleaf-layout-switch@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}