How to Use Extensions with AddBrowserExtensionAsync in WebView2?

[Fevola]

Hi everyone! I’m working with a WebView2 window in my WinUI3 app, and I’m trying to load browser extensions inside the window. Here’s the code I’m using:

CoreWebView2EnvironmentOptions options = new CoreWebView2EnvironmentOptions();
options.AreBrowserExtensionsEnabled = true;
CoreWebView2Environment environment = await CoreWebView2Environment.CreateWithOptionsAsync(null, null, options);
await WebView2Window.EnsureCoreWebView2Async(environment);
WebView2Window.Source = new Uri("http://localhost:" + port);
try
{
    var res = await WebView2Window.CoreWebView2.Profile.AddBrowserExtensionAsync("C:\\Users\\username\\AppData\\Local\\Microsoft\\Edge\\User Data\\Default\\Extensions\\amkbmndfnliijdhojkpoglbnaaahippg\\1.18.10_0");
}
catch (Exception e)
{
    System.Diagnostics.Debug.WriteLine(e.Message);
}

The problem is that when I call AddBrowserExtensionAsync, it throws an exception, but the error message (e.Message) is just an empty string.

I’m using WebView2 version 1.0.2651.64.

Has anyone run into this before or have any suggestions on how to make sure I’ve properly enabled AreBrowserExtensionsEnabled? Any help would be greatly appreciated!