Background submission of information to Mozilla must be disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-251558 | SRG-APP-000141 | FFOX-00-000014 | SV-251558r960963_rule | 2026-05-08 | 6 |
Description
Firefox by default sends information about Firefox to Mozilla servers. There should be no background submission of technical and other information from DoD computers to Mozilla with portions posted publicly.
ℹ️ Check
Type "about:policies" in the browser window.
If "DisableTelemetry" is not displayed under Policy Name or the Policy Value is not "true", 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: Disable Telemetry
Policy State: Enabled
macOS "plist" file:
Add the following:
<key>DisableTelemetry</key>
<true/>
Linux "policies.json" file:
Add the following in the policies section:
"DisableTelemetry": true