JIRA - Unable to Preview Document Attachments in Latest Firefox Version

Summary

When attempting to Preview a document attachment uploaded to an issue with the most recent release of Firefox, the document preview starts the loading process, but the document never loads. (Tested with PDF, Word, and Excel documents)

Environment

• JIRA 7.2.0-OD-04-029
• Firefox 45.0 and 45.0.1

Steps to Reproduce

1. Add a PDF attachment to any JIRA issue.
2. Click on the attachment thumbnail to open the preview feature

Expected Results

Preview feature loads successfully to navigate through the document.

Actual Results

The preview feature begins the loading process but continues loading indefinitely without bringing up the attachment. The following are observed in the browser console logs:

Notes

The preview feature functions properly on latest versions of Chrome, IE, and Safari, and older versions of Firefox. The preview feature also functions properly when previewing images. This is also an issue with the current version of Confluence, as linked on this case.