Created attachment 736754 [details] PDF print error User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0 Build ID: 20130307023931 Steps to reproduce: When printing to my Canon MX 410 (using XPS driver, windows 7 ultimate x64) network shared printer using the new Firefox PDF previewer, it will always cause an unknown error and not print. Actual results: No PDF will print using the PDF previewer. Not a single one. Expected results: Printing is fine from every other application: All office apps 2010, Notepad, Firefox html page prints, Adobe PDF reader. Tried with Windows 7 Enterprise x86 and the same thing happens.
Ah, I restarted and got the version 20.0.1 Release and now network printing works perfectly.