Examine source code of DashTab

{
  "manifest_version": 3,
  "name": "DashTab",
  "version": "1.3.1",
  "description": "Manage your bookmarks easily!",
  "permissions": [
    "windows"
  ],
  "action": {
    "default_popup": "popup1.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "popup.html"
  },
  "content_security_policy": {
    "extension_pages": "default-src 'self'; img-src 'self' https: data:; script-src 'self'; style-src 'self' 'unsafe-inline'; connect-src 'self' https://*.favicon.ico"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "PandDevSoftware@gmail.com",
      "strict_min_version": "91.0"
    }
  }
}