Examine source code of lnkdto.link

{
  "manifest_version": 2,
  "name": "lnkdto.link - Cut your links shorter.",
  "version": "1.0.0",
  "description": "A simple url shortener, to shorten your urls and manage them",
  "homepage_url": "https://lnkdto.link/",
  "icons": {
    "32": "./32.png",
    "48": "./48.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "",
    "default_popup": "https://lnkdto.link/extension"
  },
  "web_accessible_resources": []
}