If the message is displayed in this code, it gets cleared out of the cosole log as soon as the browser reload, so the user can never see it.

The only other place I could add it is in the AppInit(), but then the message will be displayed every time the browser loads: start up and reload.  That might be more confusing than helpful.

I'm not sure there is an easy way to distinguish between browser loads that occur after extensions have been disabled versus regular browser loads.