Printing from a browser has never worked.  Lions historically saved every page as a PNG, loaded it in the Gimp, cropped it, printed it to a .ps file, then wrote the .ps file to the ghostscript filter. 

Gimp no longer has any persistent settings for printing & no longer allows dragging the output in the print preview, which has made this quite ponderous.  A better solution has long been a way to automatically crop to the black areas straight from a .ps file from the browser & send it to ghostscript.