title: how to open webview inside facebook messenger on desktop web browser
body: <p>I'm trying to implement some features inside a web view in facebook messenger. on the phone the webview is opening fine, but in desctop web browser the webview is opening inside a new tab.
  im using the following feature:
  <code>
  buttons:[{
              type: "web_url",
              url: "https://www.oculus.com/en-us/rift/",
              title: "Open Web URL",
              webview_height_ratio: "compact",
              messenger_extensions: true,
            }
  </code>
  I know that maybe it is supposed to open like this but you all can agree that if I'm implementing a custom feature inside the conversation it would be mach better to open it inside a small webview in the conversation.
  does anyone knows if this even possible?</p>