Examine source code of Smart Clipboard Manager

{
  "manifest_version": 3,
  "name": "Smart Clipboard Manager",
  "version": "1.0",
  "description": "A professional clipboard manager that saves your copied items with timestamps",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "clipboardWrite",
    "tabs",
    "contextMenus",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-clipboard-manager@firefox.extension"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js",
        "floating-clips.js"
      ],
      "css": [
        "floating-clips.css"
      ]
    }
  ],
  "commands": {
    "copy-to-clipboard": {
      "suggested_key": {
        "default": "Ctrl+Shift+C"
      },
      "description": "Copy to Smart Clipboard"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}