Legacy Browser Support for IE Mode in Edge

Deploy Microsoft Edge for your organization, but open some sites in an alternative browser.
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manifest.json
{
  "name": "__MSG_extension_name__",
  "version": "8.1.3",
  "icons": {
    "16": "icon.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "manifest_version": 3,
  "minimum_chrome_version": "88",
  "description": "__MSG_extension_description__",
  "default_locale": "en",
  "background": {
    "service_worker": "js/background.js"
  },
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "nativeMessaging"
  ],
  "storage": {
    "managed_schema": "schema.json"
  },
  "incognito": "split",
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}