Suppressing the Print dialog in Firefox for auto-printing
UPDATE: This article was written over a decade ago. I haven’t tested whether this technique still works in Firefox (or any other browser with a similar setting). Use at your own risk. If you truly need this functionality, you’ll need to find out which version of Firefox was available back in early 2006 and follow these instructions. Imagine the horrific screams of Internet users world-wide as their printers start spewing coupons and ads from their printer without warning, and without the precious print dialog box to “cancel” the print process.