FAQ

###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.

• For API changes, see QZ Print vs QZ Tray.

###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.

###What does the premium version of QZ Tray offer?

• The premium version of QZ Tray provides you the ability to generate a certificate to print silently. Without this certificate, you will be given a warning on each print that an untrusted website is requesting to access local resources. This certificate is valid for one year and must be renewed to continue silent printing. Additionally, there are no client or user limitations; this certificate is valid for as many client/users as you need.

• The purchase of the premium version also provides technical support for one year. The Technical Support Team of QZ Industries, LLC will work diligently to help you integrate QZ Tray into your environment. All questions are promised to be answered as fast as possible (usually well within a 24-hour period).

###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.