chore: remove unrequired items from about:preferences

(cherry picked from commit 6529b5e62d92d07dea243719c1078f736cd5a194)

waterfox/browser/components/WaterfoxGlue.jsm

@@ -55,6 +55,9 @@ const WaterfoxGlue = {
       case "preferences-privacy":
         uri = "resource://waterfox/overlays/preferences-privacy.overlay";
         break;
+      case "preferences-home":
+        uri = "resource://waterfox/overlays/preferences-home.overlay";
+        break;
     }
     let chromeManifest = new ChromeManifest(async () => {
       let res = await fetch(uri);
@@ -114,20 +117,31 @@ const WaterfoxGlue = {
             await this.getChromeManifest("preferences-general"),
             subject
           );
-          if (subject.document.getElementById("permissionsGroup")) {
-            await Overlays.load(
-              await this.getChromeManifest("preferences-privacy"),
-              subject
-            );
-            subject.privacyInitialized = true;
-          } else {
+          if (
+            !subject.document.getElementById("permissionsGroup") &&
+            !subject.document.getElementById("homeContentsGroup")
+          ) {
             subject.setTimeout(async () => {
               await Overlays.load(
                 await this.getChromeManifest("preferences-privacy"),
                 subject
               );
+              await Overlays.load(
+                await this.getChromeManifest("preferences-home"),
+                subject
+              );
               subject.privacyInitialized = true;
             }, 500);
+          } else {
+            await Overlays.load(
+              await this.getChromeManifest("preferences-privacy"),
+              subject
+            );
+            await Overlays.load(
+              await this.getChromeManifest("preferences-home"),
+              subject
+            );
+            subject.privacyInitialized = true;
           }
           subject.initialized = true;
         }

waterfox/browser/components/preferences/content/preferences-general.xhtml

@@ -12,6 +12,7 @@
         Services.scriptloader.loadSubScript("chrome://browser/content/overlays/general.js", this);
         gMainPaneOverlay.init();
     </script>
+
     <vbox id="mainPrefPane">
         <!-- Tab Bar Position preferences -->
         <vbox id="tabPositionSettingsContainer" insertafter="browserContainersbox">

waterfox/browser/components/preferences/content/preferences-home.xhtml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
+<overlay id="preferences-overlay" xmlns:html="http://www.w3.org/1999/xhtml"
+    xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+    <vbox data-subcategory="topstories" delete="true" />
+    <vbox data-subcategory="snippets" delete="true" />
+</overlay>

waterfox/browser/components/preferences/jar.mn

@@ -2,9 +2,11 @@ browser.jar:
 %  content browser %content/browser/ contentaccessible=yes
 *    content/browser/overlays/preferences-general.xhtml            (content/preferences-general.xhtml)
      content/browser/overlays/preferences-privacy.xhtml            (content/preferences-privacy.xhtml)
+     content/browser/overlays/preferences-home.xhtml               (content/preferences-home.xhtml)
      content/browser/overlays/general.js                           (content/general.js)
      content/browser/overlays/privacy.js                           (content/privacy.js)
 
 %   resource waterfox %waterfox/ contentaccessible=yes
     waterfox/overlays/preferences-general.overlay                  (preferences-general.overlay)
     waterfox/overlays/preferences-privacy.overlay                  (preferences-privacy.overlay)
+    waterfox/overlays/preferences-home.overlay                     (preferences-home.overlay)

waterfox/browser/components/preferences/preferences-home.overlay

@@ -0,0 +1 @@
+overlay   about:preferences                 chrome://browser/content/overlays/preferences-home.xhtml