We now have an Azure portal application available on Windows, I haven’t found a lot of information but you can download the Application here:
It will install in your user profile in C:Users[user]AppDataLocalMicrosoftAzurePortalProduction
At the time of writing the downloaded version is 126.96.36.199, but just a hour ago it was 188.8.131.52, so work in progress.
Link in start menu:
A preview link is also available but this will give you the same version.
The folder includes the file LICENSES.chromium.html so a quick guess would be that this is based on the Chromium engine.