Yeah, that should work. The problem with printing straight from the browser, apart from the backgrounds not showing up, is that you get all the titles, favourites list, menus, blah blah blah...
Like Brad says, whack PrintScrn, open an image editor of some sort, go to the file menu and select "New from Clipboard" or something similar, then chop out the bits that don't look like comic.
Takes a couple of minutes, but you get a much better result.
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