Hard-disable the use of sponsored tiles.

browser/app/profile/firefox.js

@@ -1061,7 +1061,6 @@ pref("services.sync.prefs.sync.browser.download.useDownloadDir", true);
 pref("services.sync.prefs.sync.browser.formfill.enable", true);
 pref("services.sync.prefs.sync.browser.link.open_newwindow", true);
 pref("services.sync.prefs.sync.browser.newtabpage.enabled", true);
-pref("services.sync.prefs.sync.browser.newtabpage.enhanced", true);
 pref("services.sync.prefs.sync.browser.newtabpage.pinned", true);
 pref("services.sync.prefs.sync.browser.offline-apps.notify", true);
 pref("services.sync.prefs.sync.browser.safebrowsing.phishing.enabled", true);
@@ -1156,7 +1155,7 @@ pref("browser.newtabpage.introShown", false);
 pref("browser.newtabpage.enabled", true);
 
 // Toggles the enhanced content of 'about:newtab'. Shows sponsored tiles.
-sticky_pref("browser.newtabpage.enhanced", true);
+sticky_pref("browser.newtabpage.enhanced", false);
 
 // enables Activity Stream inspired layout
 pref("browser.newtabpage.compact", false);

browser/base/content/newtab/customize.js

@@ -25,7 +25,6 @@ var gCustomize = {
     this._nodes.button.addEventListener("click", e => this.showPanel(e));
     this._nodes.blank.addEventListener("click", this);
     this._nodes.classic.addEventListener("click", this);
-    this._nodes.enhanced.addEventListener("click", this);
     this._nodes.learn.addEventListener("click", this);
 
     this.updateSelected();
@@ -87,11 +86,7 @@ var gCustomize = {
         sendAsyncMessage("NewTab:Customize", {enabled: false, enhanced: false});
         break;
       case "newtab-customize-classic":
-        if (this._nodes.enhanced.getAttribute("selected")){
+        sendAsyncMessage("NewTab:Customize", {enabled: true, enhanced: false});
-          sendAsyncMessage("NewTab:Customize", {enabled: true, enhanced: true});
-        } else {
-          sendAsyncMessage("NewTab:Customize", {enabled: true, enhanced: false});
-        }
         break;
       case "newtab-customize-enhanced":
         sendAsyncMessage("NewTab:Customize", {enabled: true, enhanced: !gAllPages.enhanced});
@@ -114,9 +109,9 @@ var gCustomize = {
   },
 
   updateSelected: function() {
-    let {enabled, enhanced} = gAllPages;
+    let {enabled} = gAllPages;
-    let selected = enabled ? enhanced ? "enhanced" : "classic" : "blank";
+    let selected = enabled ? "classic" : "blank";
-    ["enhanced", "classic", "blank"].forEach(id => {
+    ["classic", "blank"].forEach(id => {
       let node = this._nodes[id];
       if (id == selected) {
         node.setAttribute("selected", true);
@@ -125,9 +120,5 @@ var gCustomize = {
         node.removeAttribute("selected");
       }
     });
-    if (selected == "enhanced") {
-      // If enhanced is selected, so is classic (since enhanced is a subitem of classic)
-      this._nodes.classic.setAttribute("selected", true);
-    }
   },
 };

browser/base/content/newtab/newTab.xhtml

@@ -33,15 +33,8 @@
           <div id="newtab-customize-title" class="newtab-customize-panel-item">
             <label>&newtab.customize.cog.title2;</label>
           </div>
-
+          <div id="newtab-customize-classic" class="newtab-customize-panel-item selectable">
-          <div class="newtab-customize-complex-option">
+            <label>&newtab.customize.classic;</label>
-            <div id="newtab-customize-classic" class="newtab-customize-panel-superitem newtab-customize-panel-item selectable">
-                <label>&newtab.customize.classic;</label>
-            </div>
-            <div id="newtab-customize-enhanced" class="newtab-customize-panel-subitem">
-                <label class="checkbox"></label>
-                <label>&newtab.customize.cog.enhanced;</label>
-            </div>
           </div>
           <div id="newtab-customize-blank" class="newtab-customize-panel-item selectable">
             <label>&newtab.customize.blank2;</label>

toolkit/modules/NewTabUtils.jsm

@@ -249,10 +249,15 @@ var AllPages = {
    * Returns whether the history tiles are enhanced.
    */
   get enhanced() {
+#ifdef MC_BASILISK
+    // Hard-block the use of sponsored tiles.
+    return false;
+#else
     if (this._enhanced === null)
       this._enhanced = Services.prefs.getBoolPref(PREF_NEWTAB_ENHANCED);
 
     return this._enhanced;
+#endif
   },
 
   /**

toolkit/modules/moz.build

@@ -57,7 +57,6 @@ EXTRA_JS_MODULES += [
     'Locale.jsm',
     'Log.jsm',
     'Memory.jsm',
-    'NewTabUtils.jsm',
     'NLP.jsm',
     'ObjectUtils.jsm',
     'PageMenu.jsm',
@@ -104,6 +103,8 @@ EXTRA_JS_MODULES += [
 EXTRA_JS_MODULES.third_party.jsesc += ['third_party/jsesc/jsesc.js']
 EXTRA_JS_MODULES.sessionstore += ['sessionstore/Utils.jsm']
 
+EXTRA_PP_JS_MODULES += ['NewTabUtils.jsm']
+
 if not CONFIG['MOZ_WEBEXTENSIONS']:
   EXTRA_PP_JS_MODULES += ['UpdateChannel.jsm']