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FFOX-00-000028 Firefox must not recommend extensions as the user is using the browser.

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

Maps to CM-7 via CCI-000381

Title

Firefox must not recommend extensions as the user is using the browser.

Control

Type "about:policies" in the browser address bar. If "UserMessaging" is not displayed under Policy Name or the Policy Value is not "ExtensionRecommendations" with a value of "false", this is a finding.

Discussion

The Recommended Extensions program recommends extensions to users as they surf the web. The user must not be encouraged to install extensions from the websites they visit. Allowed extensions are to be centrally managed.

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\User Messaging Policy Name: Extension Recommendations Policy State: Disabled macOS "plist" file: Add the following: UserMessaging ExtensionRecommendations Linux "policies.json" file: Add the following in the policies section: "UserMessaging": { "ExtensionRecommendations": false }