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    Bug 
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    Resolution: Fixed
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    High 
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    1000.844.0, 7.2.8, 7.3.0, 7.3.3
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        7.02
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        25
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        Severity 3 - Minor
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        329
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NOTE: This bug report is for JIRA Server. Using JIRA Cloud? See the corresponding bug report.
Summary
Drag and Drop attachments not working in Firefox 52.0 (or never)
Steps to Reproduce
- Use Firefox 52.0 (or never)
- Go to an Issue and try to add an attachment by dragging and dropping the file
Expected Results
The file is attached in the issue
Actual Results
- On Windows: The browser opens the file and the file isn't attached to the Issue
 Recording #2.mp4 
- On Mac OS: The file gets neither opened nor attached. The file cannot be dropped.
Note:
- in JIRA Agile, if we click on an issue from the backlog view, when we drag and drop an attachment to it, we get an error: "Exception: TypeError: o.contains is not a function".
Workaround
- For users of JIRA 7.2.x
 Upgrade JIRA Drag and Drop Attachment Plugin to 4.3.10 using Atlassian Marketplace:
 https://marketplace.atlassian.com/download/plugins/com.atlassian.jira.plugins.jira-dnd-attachment-plugin/version/166
- For users of JIRA 7.3.x
 Download the attached file: jira-dnd-attachment-plugin-4.4.10.jar , go to Administration -> Add-ons -> Manage add-ons, use the option "Upload add-on" and select the downloaded file. This is going to install a patched version of JIRA Drag and Drop Attachment Plugin on your JIRA 7.3.x instance , go to Administration -> Add-ons -> Manage add-ons, use the option "Upload add-on" and select the downloaded file. This is going to install a patched version of JIRA Drag and Drop Attachment Plugin on your JIRA 7.3.x instance