Closing QZ Tray Bug

[Ryan Mullally]

Hello,

I use QZ Tray every day with my Amazon seller account in order to print shipping labels from my Chrome browser (Desktop) directly to my thermal printer.

Sometimes I don't want to print to my thermal printer; instead, I want to only generate a PDF. In order to accomplish this, I expand my system tray, right-click on the QZ Tray icon, and select exit (that way when I purchase a shipping label it doesn't print and a pdf is auto generated).

Around 70% of the time this works and removes the QZ Tray integration from my Chrome browser. The issue is that around 30% of the time, this does not work; specifically, within Chrome I still see the option to one-click print via QZ Tray and that functionality actually works (printing to my thermal printer via 1-click). This is despite QZ Tray being closed / exited per the system tray. It's as if exiting / closing QZ tray did nothing except remove the icon from my system tray.

When this bug occurs, the only way for me to solve this is by restarting my computer. Then once I see QZ Tray in the system tray, I exit it, problem solved, QZ tray is now removed from Chrome.

What steps can I take to eliminate this behavior? I tried looking in my Task Manager; however, even when QZ Tray is running / active I don't see a process named "QZ Tray" that I can end task on. Perhaps you can suggest a process I can end task on that will truly close QZ Tray?

If you have any other suggestions or troubleshooting steps I can follow, that would be appreciated.

System Specs:
Windows 11 Pro Desktop
Chrome Version: Version 149.0.7827.115 (Official Build) (64-bit)

Thank you
Ryan Mullally

[Lite Finocchiaro]

Ryan:

I'm sorry for the trouble. This is not a QZ Tray "bug", but rather an exploit of Amazon's integration with our API. It reads to me like they cache the QZ Tray connection so it appears to be persistent in the absence of QZ Tray.

You should be able to close QZ Tray on your PC and refresh the page to confirm that QZ Tray is no longer communicating with the browser, but some integrations launch a new QZ Tray session on page load, so your mileage may vary.

Since we have no control over this, you will want to reach out to Amazon to suggest they offer the consistent ability to switch between PDF and thermal printer output.

QZ Tray can print to a virtual printer, so if that can be arranged on Amazon's seller site, and the source data can be converted to a raster format (some labels are ZPL, for example, conversion requires a special library on Amazon's server), then you could just switch to a virtual PDF printer instead of your thermal label printer and send it. 

Again, we don't know what kind of data Amazon is sending, so this is best discussed with their support team. 

Kind regards,

Lite Finocchiaro

VP, QZ Industries

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