FAQ

#Frequently Asked Questions

###What is the difference between qz-print and qz-tray?

• QZ Tray uses websockets to communicate to the browser without the use of NPAPI. On the contrary, in order for QZ Print (formerly "jzebra") to work, NPAPI must be enabled in the web browser. This is a concern because Google (Chrome) has disabled NPAPI in Chrome 32 and higher. NPAPI can be re-enabled, but this ability will be blocked permanently in September 2015.

###What are the minimum system requirements?

• Java Version

  Product	Minimum Version
  QZ Tray	Java 7 / OpenJDK 1.7
  QZ Print	Java 6 / OpenJDK 1.6

• Operating System

  Operating System	Minimum Version
  Apple OS X	OS X 10.7 Lion or higher*
  Microsoft Windows	Windows XP or higher*
  Linux	Ubuntu 12.04 Precise or higher

  *Safari 5.1.7 is bundled with Lion but is not supported. Alternate browser required. *Windows XP requires manual certificate installation; Will prompt at install time.

• Web Browser

  Web Browser	Minimum Version
  Safari	Safari 6.0.3 or higher
  Firefox	Firefox 31 or higher*
  Chrome	Chrome 31 or higher
  Internet Explorer	IE 10 or higher*

  *Confirmation needed

###How much does QZ Tray cost?

• QZ Tray is free. Organizations wishing to print silently are required to purchase a certificate from QZ Industries, LLC. Pricing options can be found on QZ's homepage at https://qz.io.

###Can a new version be installed on top of an old version?

• Yes, installation of a new version will succeed even if an older version is present and/or running.

###Does QZ Tray support HTTPS (SSL)?

• Yes, QZ Tray currently supports web pages hosted with 2048-bit SSL encryption using a just-in-time certificate installation method (all OSs require the certificate to be installed and trusted locally by your PC). Questions or concerns about the certificate installation can be directed at https://qz.io/support.