How to reproduce:
1. Open the attached project "1356405.zip"
2. In the Project window, open scene "SampleScene"
3. In the menu bar, select File>Build Settings...
4. In the Build Settings window, under the Platform tab, select WebGL
5. Press the button "Switch Platform" at the right bottom of the Build Settings window
6. Press the button "Build and Run"
7. In the application that got launched, press the button in the middle of the screen

Expected result: unity.com website opens up on the browser
Actual result: Website is not opened on the browser

Reproducible with: 2019.4.29f1, 2020.3.16f, 2021.1.17f1
Can't test with: 2021.2.0b7, 2022.1.0a5 - (Can't build because of compiler errors in Visual Scripting generated scripts)