DevToolsClient.Emulation methods doesn't affect dynamically created frames

[n303ef]

We can override User Agent, locale and some other settings through DevToolsClient.Emulation methods but they doesn't affect frames that created dynamically by JavaScript. These frames can access original browser settings which were set on Cef.Initialize().

To reproduce problem:

1. Redefine UserAgent:

_ = client.Emulation.SetUserAgentOverrideAsync("Some UserAgent");
//or: _ = client.Network.SetUserAgentOverrideAsync("Some UserAgent");

2. Attach such code to ChromiumWebBrowser.FrameLoadEnd:

string js = "alert(navigator.userAgent);";
e.Frame.ExecuteJavaScriptAsync(js);

3. Load any page with is dynamically adding frames. For example, it's a website with google ads:

browser.LoadUrl("https://browserleaks.com/");

What messages we see after that:

Some UserAgent
Some UserAgent
Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36
Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

[amaitland]

This would need to be fixed in CEF or Chromium. Not sure which though.

First try with the latest M110 release. If the problem reproduces then I'd probably start by trying say puppeteer or puppeteer-sharp and seeing if the problem reproduces there.

It's quite possibly something that needs to be fixed in CEF which has it's own issue tracker.

In future please use the Bug Report Template. Closing as upstream.