diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 6c6e50e94096..3c5a3cf9f1a5 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -2059,6 +2059,11 @@ pref("privacy.webrtc.sharedTabWarning", false);
 // before navigating to the actual meeting room page. Doesn't survive tab close.
 pref("privacy.webrtc.deviceGracePeriodTimeoutMs", 3600000);
 
+// Enable Fingerprinting Protection in private windows in Nightly.
+#ifdef NIGHTLY_BUILD
+pref("privacy.fingerprintingProtection.pbmode", true);
+#endif
+
 // Start the browser in e10s mode
 pref("browser.tabs.remote.autostart", true);
 pref("browser.tabs.remote.desktopbehavior", true);