The attachments at JIRA Cloud no longer loads on the browser when being clicked on. Previously it will loads on the browser with the media player/application associated with it upon clicking.

Steps To Replicate

1. Create an issue in JIRA Cloud
2. Attach a MP4 video file
3. Click on the attachments

Expected Behavior

It loads the attachments from the browser. Eg, for MP4, it plays with Quicktime (for MAC) or it plays with WMP (Windows).

Actual Behavior

It downloaded the file instead

More Information

This change is due to a security fix to attachments. And currently the developers are working on a preview panel for attachments, please watch this ticket for updates from our developers.