Tried on a few pages and it just doesn't show the whole page. Try to grab this one for example : https://www.3dgladiator.com/tutorials/marvelousdesigner/part02/ And this extension gives you a result with 4 pages, most of the space is blank. Not convincing at all.
Thanks so much for this. One of my most useful add-ons, first one of this type I've seen in Quantum. Having Print Preview in the context menu is always convenient, but *indispensable* on the annoying no-menu popups many sites have now for print and other functions. The Simply Page option is an unexpected bonus that has been a major help in printing some (not all) pages