When using the PDF.js viewer with documents hosted on Amazon S3, it is unclear if mozilla will stake a claim on the data and documents that are being viewed. We had originally tried to use Google Drive Viewer, but after reading a section of their privacy policy (shown below) determined it to be a non-starter. Will mozilla make similar claims to google regarding the documents that we present our viewers through the PDF.js viewer. 11.1 You retain copyright and any other rights you already hold in Content which you submit, post or display on or through, the Services. ***By submitting, posting or displaying the content you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any Content which you submit, post or display on or through, the Services.*** This license is for the sole purpose of enabling Google to display, distribute and promote the Services and may be revoked for certain Services as defined in the Additional Terms of those Services."