Cannot run extension

[shentoneco]

I've installed a Chrome extension on Microsoft Edge (Chromium) to play HLS video. I've tried on Microsoft Edge (Chromium) and it works fine. The HLS URL is http://localhost/hls/taiguo/playlist.m3u8 and the Microsoft Edge browser displays the full URL as: extension://ekcifneimckhkjdfklkkpdlnckcjhmke/index.html#http://localhost/hls/taiguo/playlist.m3u8.

I want to use the code sample from Getting Started with WebView2 (developer preview) to play the media in a Windows program. If I call Navigate(...) using the .m3u8 URL as follows:
webviewWindow->Navigate(L"http://localhost/hls/taiguo/playlist.m3u8");
the application will download the playlist file, but not play the media automatically. If I use the full extension like:
webviewWindow->Navigate(L"extension://ekcifneimckhkjdfklkkpdlnckcjhmke/index.html#http://localhost/hls/taiguo/playlist.m3u8");
the app will display the following error message:
ekcifneimckhkjdfklkkpdlnckcjhmke is blocked
Requests to the server have been blocked by an extension.
Try disabling your extensions.

I hope someone can tell me what is the correct way to run extension using WebView2. Thanks in advance!