Firefox extension recommendations must be disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-251570 | SRG-APP-000141 | FFOX-00-000026 | SV-251570r1067563_rule | 2026-05-08 | 6 |
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.
ℹ️ Check
Type "about:policies" in the browser address bar.
If "Preferences" is not displayed under Policy Name and the Policy Value does not include "extensions.htmlaboutaddons.recommendations.enabled" with a value of "false" and status of "locked", this is a finding.
✔️ 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:
<key>Preferences</key>
<dict>
<key>extensions.htmlaboutaddons.recommendations.enabled</key>
<dict>
<key>Value</key>
<false/>
<key>Status</key>
<string>locked</string>
</dict>
</dict>
Linux "policies.json" file:
Add the following in the policies section:
"Preferences": {
"extensions.htmlaboutaddons.recommendations.enabled": {
"Value": false,
"Status": "locked"
},