Examine source code of Session Saver & Manager

{
  "manifest_version": 3,
  "name": "Session Saver & Manager",
  "version": "1.0",
  "description": "Saves the current browsing session (all open windows and tabs) as a named session, allowing users to close them and reopen them later with a single click. Useful for managing multiple projects or research topics.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "session_saver_&_manager.png"
  },
  "icons": {
    "128": "session_saver_&_manager.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "svensonh7062003djzkg@hotmail.com"
    }
  }
}