Examine source code of Clipboard Cleaner

{
  "manifest_version": 3,
  "name": "Clipboard Cleaner",
  "version": "1.2",
  "description": "Cleans injected clipboard content on copy.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_page": "options.html",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "clipboardcleaner@lol.com"
    }
  }
}