diff --git a/src/i2p.firefox.base.profile/user-overrides.js b/src/i2p.firefox.base.profile/user-overrides.js
index 8471540..678566a 100644
--- a/src/i2p.firefox.base.profile/user-overrides.js
+++ b/src/i2p.firefox.base.profile/user-overrides.js
@@ -226,4 +226,5 @@ user_pref("webgl.disable-fail-if-major-performance-caveat", true);
 user_pref("webgl.enable-webgl2", false);
 user_pref("dom.w3c_touch_events.enabled", false);
 user_pref("browser.privatebrowsing.autostart", false);
-user_pref("browser.display.use_system_colors", false);
\ No newline at end of file
+user_pref("browser.display.use_system_colors", false);
+user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", false);
\ No newline at end of file
diff --git a/src/i2p.firefox.usability.profile/user-overrides.js b/src/i2p.firefox.usability.profile/user-overrides.js
index 8471540..678566a 100644
--- a/src/i2p.firefox.usability.profile/user-overrides.js
+++ b/src/i2p.firefox.usability.profile/user-overrides.js
@@ -226,4 +226,5 @@ user_pref("webgl.disable-fail-if-major-performance-caveat", true);
 user_pref("webgl.enable-webgl2", false);
 user_pref("dom.w3c_touch_events.enabled", false);
 user_pref("browser.privatebrowsing.autostart", false);
-user_pref("browser.display.use_system_colors", false);
\ No newline at end of file
+user_pref("browser.display.use_system_colors", false);
+user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", false);
\ No newline at end of file
diff --git a/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileBuilder.java b/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileBuilder.java
index 788ce1b..6965d01 100644
--- a/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileBuilder.java
+++ b/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileBuilder.java
@@ -232,10 +232,19 @@ public class I2PFirefoxProfileBuilder extends I2PCommonBrowser {
       logger.info("Error copying base profile to profile" + e);
       return false;
     }
-    // if user-overrides.js does not exist yet, make an empty one.
-    // if (!touch(profileDir.toString(), "user-overrides.js")) {
-    // return false;
-    //}
+    if (userOverrides.exists()) {
+      if (app) {
+        I2PFirefoxProfileChecker.undoValue(
+            "user_pref(\"toolkit.legacyUserProfileCustomizations.stylesheets\", false);",
+            "user_pref(\"toolkit.legacyUserProfileCustomizations.stylesheets\", true);",
+            userOverrides);
+      } else {
+        I2PFirefoxProfileChecker.undoValue(
+            "user_pref(\"toolkit.legacyUserProfileCustomizations.stylesheets\", true);",
+            "user_pref(\"toolkit.legacyUserProfileCustomizations.stylesheets\", false);",
+            userOverrides);
+      }
+    }
     return true;
   }
 
diff --git a/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileChecker.java b/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileChecker.java
index a06f1ff..242ddc0 100644
--- a/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileChecker.java
+++ b/src/java/net/i2p/i2pfirefox/I2PFirefoxProfileChecker.java
@@ -134,8 +134,8 @@ public class I2PFirefoxProfileChecker extends I2PCommonBrowser {
     return true;
   }
 
-  private static boolean undoValue(String oldString, String newString,
-                                   File fileToBeModified) {
+  public static boolean undoValue(String oldString, String newString,
+                                  File fileToBeModified) {
     String oldContent = "";
     BufferedReader reader = null;
     FileWriter writer = null;