Final answer:
False
Step-by-step explanation:
Adding "?mboxDebug=1" to the end of a URL does not open the browser's console to display messages. Enabling the "mboxDebug" parameter allows you to see additional information about how content is loaded and displayed on a website when Adobe Target is active. It does not directly open the browser's console or display messages about what happens behind the scenes and in which order. It may not always open the browser console directly. This parameter is not universal and it depends on the software platform or web application. Usually, this type of debugging tool is implemented by the developers to help identify problems or monitor activity / content loaded in the application.
Learn more about mboxDebug