One aspect of Firefox I value is the ability to customize headers and footers on printed webpages. This ability is important for my work. I customized the headers and footers in the about:config interface according to advice posted [[https://support.mozilla.org/en-US/questions/1323433|here]]. Recently, these settings don't take effect when I print webpages to pdf. I've triple checked that the settings are correct, but every time I print, the header and footer remain in the Firefox default configuration. Inexplicably, my preferred settings do take effect if I set the destination to "Fax." All other destinations don't work. Is there any way to make these settings work again? Sadly, this might be a dealbreaker for me if not.