I hope it is acceptable to bump this thread with an easy solution, should anyone else have the same issue.
The only requirement is that you install uBlock Origin, and of course a browser that supports it. Chrome, FireFox, Safari, and a number of others.
To block the header, right-click on the uBlock Origin icon in your toolbar and select "block element". This will allow you to mouse over the header image, click it, and block it. Preview the change to make sure you have done it right; the header (and the header alone) should disappear.
Hazel