OS
Windows 10

Gmail Desktop Version
3.0.0-alpha-.37 (dev)

Describe the bug
If Gmail has clipped a long message in the default thread email view, it will include a link at the bottom to "view entire message":

Clicking on this link opens the following prompt:

Clicking on open link directs to the web browser. If the link originated from a different Gmail account than the one signed in on the browser, the link will understandably not work:

Steps to reproduce the behavior

1. View a long, clipped email message
2. Click on "view entire message" at the bottom of the email viewer
3. Click on "open link" in the prompt about opening an external link
4. Web browser will open

Expected behavior
Since this directs to a Gmail link (mail.google.com) it should open within Gmail Desktop, ideally as a popup that preserves the account context so that the link is accessible.