Steps to Reproduce

1. Open either of the 2 browsers (Edge or IE)
2. Go to https://flutter.github.io/samples/
3. Nothing loads

Expected results:

The app loads or a default page showing the currently supported browsers & versions is displayed.

Actual results:

For the samples a black page displays / nothing happens.

For other apps:

A blank page with the This page can't be displayed or Hmm... Can't reach this page titles show or worse it suggests that the page is unsafe and recommends to enable lower TLS support in the browser althought the browser has those settings on.

https://adobe.ly/2Oc85l9

Flutter 1.14.7-pre.38 • channel master • https://github.com/flutter/flutter.git
Framework • revision 92f7e16312 (10 hours ago) • 2020-01-29 17:51:31 -0800
Engine • revision 6007c17fd2
Tools • Dart 2.8.0 (build 2.8.0-dev.5.0 fc3af737c7)