Did something change in Edge recently? JSAPI apps still fully functional in Chrome but lost functionality in Edge

Question

We're in code red trying to figure out why the Legend widget, LayerList widget and the Editor widget are not working properly in Edge all of a sudden. 4.28, no recent code changes. The operation symptoms in Edge: widgets (above) can no longer interact with the map, attempting to get a map popup seizes the app (Other interactions with the mapview cause it to seize as well), Calcite widgets we've built no longer interact with the mapview, others. This also affects labelling in certain maps - apparently authored in ArcGIS Pro. But it is related, which is really bizarre.

Dirk_Vandervoort · Answer

This gets even weirder:

* Edge in standard mode inside our VPN seizes when the map is interacted with. Even after being restored to factory settings.
* Edge InPrivate mode inside our VPN is fully functional.

Seriously?

Dirk_Vandervoort · Answer

Additional Details:

* Edge browser map loses the ability to interact with the user and widgets inside our corporate domain and VPN.
* Edge browser map interacts expectedly with the user and widgets when accessed outside our corporate domain and VPN - i.e., the Internet.
* i.e., it's not the browser, it's our intranet or its firewall

Here is an an example:

* In Edge navigate to https://developers.arcgis.com/javascript/latest/sample-code/widgets-legend-card/live/  - an Esri developer site
* Inside our intranet the map popup looks like this (error condition):

* Outside our firewall the map popup looks like this (expected behavior):

* In the error log on the console we see this:

YMMV

Dirk_Vandervoort · Answer

* EDGE: Version 129.0.2792.65 (Official build) (64-bit) 
* CHROME: Version 129.0.6668.90 (Official Build) (64-bit)

Both appear to be up-to-date. Issue is still happening.

The issue does not occur on Edge on private computers. This The issue only occurs on company PCs inside the corporate firewall. This leads me to believe that it's "something" about our corporate Edges. Stay tuned.