Why did you broke printing routine, and how to get it back?

In the 19th version of Firefox printing routine was changed, and for the worst. First of all, how the hell should I guess, that when I'm in preview page mode, change in a "Scale" parameter will affect printing result? That's just madness. It looks like an option for view, not for printing. Secondly, I can't get a page printed correctly. I have a page formatted to perfectly fit on an standard A4 paper. And up to Firefox 18.xx it worked like a charm. But not now. When I use "fit to width" option, page gets too long and it doesn't fit on a paper. When I use "scale", printed result is shifted to the left side of the paper, completely ignoring margins set in a "page setup" window. Well, what can I say - in Chrome browser it prints just fine.