diff --git a/5.1-Updater-[Options].md b/5.1-Updater-[Options].md
index 296d007..b95f52e 100644
--- a/5.1-Updater-[Options].md
+++ b/5.1-Updater-[Options].md
@@ -84,11 +84,11 @@ The following example illustrates how `-merge` works:<br><br>
 /* 0801: disable location bar using search ***/
 user_pref("keyword.enabled", false);
 
-/* 1202: control TLS versions with min and max ***/
-user_pref("security.tls.version.max", 4); // 4 = allow up to and including TLS 1.3
-
 /* 2503: disable giving away network info (FF31+) */
 user_pref("dom.netinfo.enabled", false);
+
+/* 4504: enable RFP letterboxing [FF67+] ***/
+user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF]
 ```
 
 🔹 user-overrides.js:
@@ -98,7 +98,7 @@ user_pref("browser.safebrowsing.allowOverride", false); // 0405 - remove SB bypa
 user_pref("keyword.enabled", true); // 0801 - I use a privacy respecting engine
 user_pref("dom.netinfo.enabled", false); // 25xx - enforcing false
 
-//// --- comment-out --- 'security.tls.version.max' -1202- wait until FF enables TLS1.3 for everyone
+//// --- comment-out --- 'privacy.resistFingerprinting.letterboxing' -4504- too distacting
 ```
 
 🔹 final user.js after update + merging:
@@ -109,8 +109,8 @@ user_pref("dom.netinfo.enabled", false); // 25xx - enforcing false
 /* 0801: disable location bar using search ***/
 user_pref("keyword.enabled", true); // 0801 - I use a privacy respecting engine
 
-/* 1202: control TLS versions with min and max ***/
-//user_pref("security.tls.version.max", 4); // 4 = allow up to and including TLS 1.3
+/* 4504: enable RFP letterboxing [FF67+] ***/
+//user_pref("privacy.resistFingerprinting.letterboxing", true); // [HIDDEN PREF]
 
 /*** 4600: RFP (4500) ALTERNATIVES [SETUP] ***/
 /* [NOTE] ESR52.x and non-RFP users replace the * with a slash on this line to enable these
@@ -121,13 +121,13 @@ user_pref("dom.netinfo.enabled", false); // 25xx - enforcing false
 /*** my user.js overrides ***/
 user_pref("browser.safebrowsing.allowOverride", false); // 0405 - remove SB bypass button
 
-//// --- comment-out --- 'security.tls.version.max' -1202- wait until FF enables TLS1.3 for everyone
+//// --- comment-out --- 'privacy.resistFingerprinting.letterboxing' -4504- too distacting
 ```
 
 🔹 a couple things to note here:
-* 0405 was not merged because it's inactive in the user.js. Instead the override was appended at the bottom.
-* 0801 was merged with the override, including the comment from the overrides file.
-* 1202 was commented out and the original value and comment are kept intact
+* `0405` was not merged because it's inactive in the user.js. Instead the override was appended at the bottom.
+* `0801` was merged with the override, including the comment from the overrides file.
+* `4504` was commented out and the original value and comment are kept intact
 * the netinfo line was merged but the pref has been moved to 4600 in the updated user.js (see info below)
 * the special comment-out command was also appended at the bottom as a reminder that you gave that command