Print margins on Firefox (also with Print Edit)?
Solution 1:
Click on the Main menu and choose Print
Go to the top and clik Page setup
Then click on where you would choose A3 and go to the bottom of the list to Manage custom... click on that option and you'll be presented with this box.
If you want to use Chromium in the future just press CTRL + P and click on Margins -> Custom on the left panel.
