Firefox Error: getOperatorList - ignoring errors during "GetOperatorList: page 0" task: "DataCloneError: The object could not be cloned."

Hi Team,

I am facing below issue in the pdf.worker.js file, while viewing the document on the PDF.js Express Viewer. The issue is only occurring in the FireFox Browser(of course my browser is up to date), other working perfectly fine in Chrome and Edge.

getOperatorList - ignoring errors during “GetOperatorList: page 0” task: "DataCloneError: The object could not be cloned."

Please advice if I need to upgrade version of PDF.js Express, currently I am using 7.3.3.

Warm Regards

Can anyone please revert on my query ?

Warm Regards,

Hi there,

Unfortunately I cannot reproduce your issue.

  • Does it happen with all documents or just a certain one?
  • Are you able to link me to a url/repo where you can reproduce?
  • Do you have any code that may be causing this issue? Please share a code snippet of how you are using Express

PS. Next time, please fill out the issue template correctly as it prevents me from having to ask follow up questions.

Thank you!

Hi Logan,

I will come back to you with the details you asked. However, which issue template you are saying me to fill out?
I am already wondering that I didn’t get any revert from your side since Friday, 23Jul.

Warm Regards

Hi there,

When you create a new issue there is a template that it asks you to fill out.

2 business days for a support response is very typical, especially for a free support channel. Please keep in mind that the people providing support also develop the software, so we need to manage our time accordingly.

Looking forward to further details,


Moving this conversation here.