Examine source code of Link Preview

{
  "name": "Link Preview",
  "version": "1.4.0",
  "description": "Your Instant Window to the Web",
  "homepage_url": "https://liujiacai.net/link-preview",
  "author": "dev@liujiacai.net",
  "action": {
    "default_title": "Preview Link",
    "default_icon": "logo.png"
  },
  "icons": {
    "128": "logo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "option.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "microtip.min.css"
      ],
      "js": [
        "common.js",
        "content.js"
      ]
    }
  ],
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "dev@liujiacai.net"
    }
  }
}