1973005 - Double-clicking blocked file from Library/about:downloads opens empty tab

Status: NEW

(Firefox :: Data Loss Prevention, defect)

Description

[Bianca Hidecuti, Desktop Test Engineering [:bhidecuti]]

Attachment: video showing the issue

Found in

• 141.0a1 (2025-06-18)

Affected versions

• 141.0a1 (2025-06-18)

Tested platforms

• Affected platforms: Windows 10, Windows 11
• Unaffected platforms: Ubuntu, macOS

Preconditions

• Download the DLP test assets from https://drive.google.com/file/d/1yjqVRuxdKV3WnO7D2wzMgDXBuYBxUgVw/view
• Create a distribution folder inside the Firefox folder and paste the policies.json
• DLP Agent is running: .\content_analysis_sdk_agent.exe --user --toblock=.*\d{3}-?\d{2}-?\d{4}.* --towarn=.*warn.* --delays=10

Steps to reproduce

1. Download a blocked file using the context menu
2. Open the Library or about:downloads and double click the blocked file

Expected result

• Nothing should happen when double-clicking on the blocked file

Actual result

• A new empty tab opens when double-clicking on the blocked file

Regression range

• Not a regression, as this is a new feature

Additional notes

• Attached a screen recording
• Not reproducing from the Downloads panel or when the file is downloaded without using the context menu (the file opens in a new tab)