What you've missed is the overarching issue here, though.
Mozilla will strip out useful functionality from Firefox (like the status bar, for example), and anyone desiring such functionality is told to install some extension to restore the now-missing functionality.
If such an attitude is acceptable when it comes to functionality that Firefox users find useful, then it is just as acceptable when it comes to functionality that Mozilla may find useful.
Mozilla should offer this as an optional extension. If users wish to financially support Mozilla in this way, then they are free to install it and provide such financial support. Otherwise, Firefox users aren't subjected to financing Mozilla in a way that may not be considered acceptable.