I’ve been seeing an increasing number of bug reports recently where users are using MessageBox to illustrate the current state of a control or property and wanted to point out that just showing a MessageBox changes the state of the app because it sends commands to the browser.
Going forward, please use System.DebugLog to show your diagnostic messages. They will show up in the message panel at the bottom of the IDE like this:
This will greatly improve our ability to quickly reproduce your bug reports.