Reproed on community-release, but not mysql.test running the 4.3.1 desktop app on Mac. This seems to only happen on servers using an image proxy (or possibly certain image proxies).
1) Post an external image link such as
2) Click on the image to open the View Image modal
3) Click on the image in the modal
Observed: On a server with an image proxy, the image opens within the app. Otherwise, the image opens in the browser
Expected: The image always opens in the browser