Examine source code of Clipboard Keeper

{
  "manifest_version": 3,
  "name": "Clipboard Keeper",
  "version": "1.0",
  "description": "Clipboard Keeper extends your system clipboard by storing a history of copied text and images. Users can access previous clipboard entries from a dropdown menu, search through their history, and paste items with a single click, boosting efficiency.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "clipboard_keeper.png"
  },
  "icons": {
    "128": "clipboard_keeper.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "csestherorellanaybvr384@hotmail.com"
    }
  }
}