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Firefox extension recommendations must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-251570 FFOX-00-000026 SV-251570r820759_rule Medium
Description
The Recommended Extensions program makes it easier for users to discover extensions that have been reviewed for security, functionality, and user experience. Allowed extensions are to be centrally managed.
STIG Date
Mozilla Firefox Security Technical Implementation Guide 2022-09-09

Details

Check Text ( C-55005r807180_chk )
Type "about:policies" in the browser address bar.

If "extensions.htmlaboutaddons.recommendations.enabled" is not displayed with a value of "false", this is a finding.
Fix Text (F-54959r820758_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:
{
"extensions.htmlaboutaddons.recommendations.enabled": {
"Value": false,
"Status": "locked"
}
}

macOS "plist" file:
Add the following:
Preferences

extensions.htmlaboutaddons.recommendations.enabled

Value

Status
locked



Linux "policies.json" file:
Add the following in the policies section:
"Preferences": {
"extensions.htmlaboutaddons.recommendations.enabled": {
"Value": false,
"Status": "locked"
},