Firefox won't print correctly from my iMac (running OS X 10.10.4). When I print, the font is very large and only a few letters or parts of words show up on a page. I have tried all of the steps that are suggested under the Fixing Print problems (including changing the font in preferences) and none of them fixed my problem. I have to use Firefox for school work. I bought a new HP printer thinking it would solve the problem and it doesn't. Please Help!