Printing only half a page
Provide troubleshooting steps as I am stuck on how to resolve this problem as the printer works fine every other browser.
Alla svar (2)
Sorry, yes, there is a bug in Firefox 90 when the page is scaled, either manually (for example, set to 80%) or using Fit to page width/Shrink to fit. Work is underway to fix it, but we don't have any information on when that might roll out in an update. (Today's update doesn't have a fix for this.)
Version 90.0.2 was released today to fix this printing problem. https://www.mozilla.org/firefox/90.0.2/releasenotes/