OpenSUSE Leap 15 with updates.
One of the newer features of Firefox is the pdf viewer. I found this very useful. However some of the printed page output may not be as good as it seems. Your mileage may vary but I found the graphics output from Okular to be much better. So check for yourself. If you need to print a pdf file you may get a better result by downloading the file and printing with Okular. My 2c.