Unable to attach files to a tab

Summary

Upon attaching a file to the Tabs macro, the process continuously spins in the Uploading files state. 

Open

Environment

• Confluence and Composition Cloud

• Firefox Browser version 78.x or earlier

Diagnostics steps

Not applicable. 

Cause

This is due to an older version of Firefox (For example, Firefox 68.7esr).

Workaround

Not applicable. 

Resolution

Please upgrade to the latest Firefox version 78.0 or later.