Print CSS is one of the most neglected areas of web development. Firefox has good print support and DevTools to help, but browser differences exist. Here's what developers need to know. Simulating Print in Firefox DevTools Toggle print media emulation : DevTools β†’ Responsive Design Mode (Ctrl+Shift+M) β†’ Press the three dots (…) β†’ Print Media Or in DevTools β†’ Inspector β†’ top toolbar β†’ three dots β†’ Print simulation (the exact UI varies by version). Alternative (always wor...