I was not able to reproduce this. I tested it on Windows 10 64bit with Firefox release 68.0.1 Opened these pdfs: www.africau.edu/images/default/sample.pdf https://gahp.net/wp-content/uploads/2017/09/sample.pdf Saved them to my hard drive, then opened each file downloaded and i saw the different documents. Since now it works for you i will mark this as resolved.
Bug 1571235 Comment 3 Edit History
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I was not able to reproduce this. I tested it on Windows 10 64bit with Firefox release 68.0.1 Opened these pdfs: www.africau.edu/images/default/sample.pdf https://gahp.net/wp-content/uploads/2017/09/sample.pdf Saved them to my hard drive, then opened each file downloaded and i saw the different documents. Since now it works for you i will mark this as resolved. If the issue is still reproducible in the future, feel free to reopen the bug with more information Regards Pablo