Free PDF.js Express Viewer keys Watermark

Hi folks, does Free PDF.js Express Viewer keys leaves PDFJS watermark on the documents?
What should we do to remove the pdfjs watermark?

No it does not leave a watermark, please follow the instructions here to add your license key to remove the watermark.

NOTE: localhost will persist watermark, deployed will not.

Best Regards,
Zach Serviss
Web Development Support Engineer
PDFTron Systems, Inc.