Firefox network prediction must be disabled.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-251566 | SRG-APP-000141 | FFOX-00-000022 | SV-251566r960963_rule | 2025-02-11 | 6 |
| Description |
|---|
| If network prediction is enabled, requests to URLs are made without user consent. The browser should always make a direct DNS request without prefetching occurring. |
| ℹ️ Check |
|---|
| Type "about:policies" in the browser window. If "NetworkPrediction" is not displayed under Policy Name or the Policy Value is not "false", 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: Network Prediction Policy State: Disabled macOS "plist" file: Add the following: <key>NetworkPrediction</key> <false/> Linux "policies.json" file: Add the following in the policies section: "NetworkPrediction": false |