diff --git a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.css b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.css
index 29d7a843d76d..4267813ccb6a 100644
--- a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.css
+++ b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.css
@@ -4,7 +4,3 @@ body[tpEnabled] .showTpDisabled,
 body:not([tpEnabled]) .showTpEnabled {
   display: none !important;
 }
-
-.hide {
-  display: none;
-}
diff --git a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js
index 68349a2bdc1a..bfd3c4c2af22 100644
--- a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js
+++ b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.js
@@ -24,11 +24,11 @@ function updateTPInfo() {
   let tpDescription = document.getElementById("tpDescription");
   let cbDescription = document.getElementById("cbDescription");
 
-  tpTitle.classList.toggle("hide", contentBlockingUIEnabled);
-  tpDescription.classList.toggle("hide", contentBlockingUIEnabled);
+  tpTitle.toggleAttribute("hidden", contentBlockingUIEnabled);
+  tpDescription.toggleAttribute("hidden", contentBlockingUIEnabled);
 
-  cbTitle.classList.toggle("hide", !contentBlockingUIEnabled);
-  cbDescription.classList.toggle("hide", !contentBlockingUIEnabled);
+  cbTitle.toggleAttribute("hidden", !contentBlockingUIEnabled);
+  cbDescription.toggleAttribute("hidden", !contentBlockingUIEnabled);
 
   let globalTrackingEnabled = RPMGetBoolPref(TP_ENABLED_PREF);
   let trackingEnabled = globalTrackingEnabled || RPMGetBoolPref(TP_PB_ENABLED_PREF);
@@ -37,13 +37,13 @@ function updateTPInfo() {
     let contentBlockingEnabled = RPMGetBoolPref(CB_ENABLED_PREF);
     trackingEnabled = trackingEnabled && contentBlockingEnabled;
   } else {
-    title.classList.toggle("hide", trackingEnabled);
-    titleTracking.classList.toggle("hide", !trackingEnabled);
+    title.toggleAttribute("hidden", trackingEnabled);
+    titleTracking.toggleAttribute("hidden", !trackingEnabled);
   }
 
   // if tracking protection is enabled globally we don't even give the user
   // a choice here by hiding the toggle completely.
-  tpButton.classList.toggle("hide", globalTrackingEnabled);
+  tpButton.toggleAttribute("hidden", globalTrackingEnabled);
   tpToggle.checked = trackingEnabled;
 
   tpSubHeader.classList.toggle("tp-off", !trackingEnabled);
diff --git a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.xhtml b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.xhtml
index 5d37e9ad3727..2ef8bf4329b2 100644
--- a/browser/components/privatebrowsing/content/aboutPrivateBrowsing.xhtml
+++ b/browser/components/privatebrowsing/content/aboutPrivateBrowsing.xhtml
@@ -34,7 +34,7 @@
     <div class="showPrivate container">
       <h1 class="title">
         <span id="title">&privateBrowsing.title;</span>
-        <span id="titleTracking" class="hide">&privateBrowsing.title.tracking;</span>
+        <span id="titleTracking" hidden="hidden">&privateBrowsing.title.tracking;</span>
       </h1>
       <section class="section-main">
         <p>&aboutPrivateBrowsing.info.notsaved.before;<strong>&aboutPrivateBrowsing.info.notsaved.emphasize;</strong>&aboutPrivateBrowsing.info.notsaved.after;</p>