[Problem/Bug]: WebView2 makes request to http://edge.microsoft.com/browsernetworktime/time/1/current?cup2key=[...]

[lliverton]

What happened?

Description

WebView2 makes a background requests to http://edge.microsoft.com/browsernetworktime/time/1/current?cup2key=[...]

Version
SDK: 1.0.2792.45
Runtimes:

• 134.0.3080.0 Canary
• 133.0.3065.7 Dev

Framework: WPF
OS: Win11

The returned json contains come curious characters at the start and then a current time and a nonce.

)]}'
{"current_time_millis":1737106442557,"server_nonce ":2.7029712098304446E+20}

This request started appearing since Edge Canary version 133.0.3037.0 in our automated tests ran against pre-release Edge channels. It's not a feature that is enabled in WebView2 and it is sensitive from a privacy perspective. Can this be removed?

Here are previous tickets raised to disable network requests:
#4180
#2671

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Prerelease (Edge Canary/Dev/Beta)

Runtime Version

134.0.3080.0 Canary

SDK Version

1.0.2792.45

Framework

WPF

Operating System

Windows 11

OS Version

No response

Repro steps

Start Fiddler or a similar MITM proxy
Run an app that uses WebView2 with the Canary or Dev runtime version. If re-running an existing app make sure to delete the bin folder so the webview2 profile is deleted.
As soon as the app starts and a navigation request is made a call will be made to http://edge.microsoft.com/browsernetworktime/time/1/current?cup2key=[...]

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

No response