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FFOX-00-000011 Firefox must be configured to prevent JavaScript from raising or lowering windows.

DISA STIG library V6R9
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

Firefox must be configured to prevent JavaScript from raising or lowering windows.

Control

Type "about:policies" in the browser address bar. If "Preferences" is not displayed under Policy Name or the Policy Value does not include "dom.disable_window_flip" with a value of "true" and status of "locked", this is a finding.

Discussion

JavaScript can raise and lower browser windows to cause improper input. Configure the browser setting to prevent scripts on visited websites from raising and lowering browser windows.

Related controls

CCI-000381

Fix

Windows group policy: 1. Open the group policy editor tool with "gpedit.msc". 2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Mozilla\Firefox\ Policy Name: Preferences Policy State: Enabled Policy Value: { "dom.disable_window_flip": { "Value": true, "Status": "locked" } } macOS "plist" file: Add the following: Preferences dom.disable_window_flip Value Status locked Linux "policies.json" file: Add the following in the policies section: "Preferences": { "dom.disable_window_flip": { "Value": true, "Status": "locked" } }