--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -1125,7 +1125,7 @@ void ChromeContentBrowserClient::Registe
 void ChromeContentBrowserClient::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(prefs::kDisable3DAPIs, false);
-  registry->RegisterBooleanPref(prefs::kEnableHyperlinkAuditing, true);
+  registry->RegisterBooleanPref(prefs::kEnableHyperlinkAuditing, false);
   registry->RegisterListPref(prefs::kEnableDeprecatedWebPlatformFeatures);
   // Register user prefs for mapping SitePerProcess and IsolateOrigins in
   // user policy in addition to the same named ones in Local State (which are
--- a/chrome/browser/ui/browser_ui_prefs.cc
+++ b/chrome/browser/ui/browser_ui_prefs.cc
@@ -66,11 +66,11 @@ void RegisterBrowserUserPrefs(user_prefs
   registry->RegisterBooleanPref(prefs::kWebAppCreateInAppsMenu, true);
   registry->RegisterBooleanPref(prefs::kWebAppCreateInQuickLaunchBar, true);
   registry->RegisterBooleanPref(
-      prefs::kOfferTranslateEnabled, true,
+      prefs::kOfferTranslateEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterStringPref(prefs::kCloudPrintEmail, std::string());
   registry->RegisterBooleanPref(prefs::kCloudPrintProxyEnabled, true);
-  registry->RegisterBooleanPref(prefs::kCloudPrintSubmitEnabled, true);
+  registry->RegisterBooleanPref(prefs::kCloudPrintSubmitEnabled, false);
   registry->RegisterDictionaryPref(prefs::kBrowserWindowPlacement);
   registry->RegisterDictionaryPref(prefs::kBrowserWindowPlacementPopup);
   registry->RegisterDictionaryPref(prefs::kAppWindowPlacement);
--- a/chrome/browser/net/prediction_options.cc
+++ b/chrome/browser/net/prediction_options.cc
@@ -32,7 +32,7 @@ NetworkPredictionStatus CanPrefetchAndPr
       }
       return NetworkPredictionStatus::DISABLED_DUE_TO_NETWORK;
     default:
-      DCHECK_EQ(NETWORK_PREDICTION_NEVER, network_prediction_options);
+      //DCHECK_EQ(NETWORK_PREDICTION_NEVER, network_prediction_options);
       return NetworkPredictionStatus::DISABLED_ALWAYS;
   }
 }
--- a/chrome/browser/net/prediction_options.h
+++ b/chrome/browser/net/prediction_options.h
@@ -23,7 +23,7 @@ enum NetworkPredictionOptions {
   NETWORK_PREDICTION_ALWAYS,
   NETWORK_PREDICTION_WIFI_ONLY,
   NETWORK_PREDICTION_NEVER,
-  NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_WIFI_ONLY,
+  NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_NEVER,
 };
 
 enum class NetworkPredictionStatus {
--- a/chrome/browser/background/background_mode_manager.cc
+++ b/chrome/browser/background/background_mode_manager.cc
@@ -352,7 +352,7 @@ void BackgroundModeManager::RegisterPref
   registry->RegisterBooleanPref(prefs::kChromeCreatedLoginItem, false);
   registry->RegisterBooleanPref(prefs::kMigratedLoginItemPref, false);
 #endif
-  registry->RegisterBooleanPref(prefs::kBackgroundModeEnabled, true);
+  registry->RegisterBooleanPref(prefs::kBackgroundModeEnabled, false);
 }
 
 void BackgroundModeManager::RegisterProfile(Profile* profile) {
--- a/components/content_settings/core/browser/cookie_settings.cc
+++ b/components/content_settings/core/browser/cookie_settings.cc
@@ -50,7 +50,7 @@ void CookieSettings::GetCookieSettings(
 void CookieSettings::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
-      prefs::kBlockThirdPartyCookies, false,
+      prefs::kBlockThirdPartyCookies, true,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
--- a/chrome/browser/ui/navigation_correction_tab_observer.cc
+++ b/chrome/browser/ui/navigation_correction_tab_observer.cc
@@ -55,7 +55,7 @@ NavigationCorrectionTabObserver::~Naviga
 // static
 void NavigationCorrectionTabObserver::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* prefs) {
-  prefs->RegisterBooleanPref(prefs::kAlternateErrorPagesEnabled, true,
+  prefs->RegisterBooleanPref(prefs::kAlternateErrorPagesEnabled, false,
                              user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
--- a/components/autofill/core/common/autofill_prefs.cc
+++ b/components/autofill/core/common/autofill_prefs.cc
@@ -130,10 +130,10 @@ const char kAutocompleteLastVersionReten
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   // Synced prefs. Used for cross-device choices, e.g., credit card Autofill.
   registry->RegisterBooleanPref(
-      prefs::kAutofillEnabledDeprecated, true,
+      prefs::kAutofillEnabledDeprecated, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(
-      prefs::kAutofillProfileEnabled, true,
+      prefs::kAutofillProfileEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterIntegerPref(
       prefs::kAutofillLastVersionDeduped, 0,
@@ -146,7 +146,7 @@ void RegisterProfilePrefs(user_prefs::Pr
       prefs::kAutofillLastVersionDisusedAddressesDeleted, 0,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(
-      prefs::kAutofillCreditCardEnabled, true,
+      prefs::kAutofillCreditCardEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterStringPref(
       prefs::kAutofillProfileValidity, "",
--- a/chrome/browser/resources/settings/reset_page/reset_profile_dialog.html
+++ b/chrome/browser/resources/settings/reset_page/reset_profile_dialog.html
@@ -52,7 +52,7 @@
         </paper-button>
       </div>
       <div slot="footer">
-        <cr-checkbox id="sendSettings" checked>
+        <cr-checkbox id="sendSettings">
           $i18nRaw{resetPageFeedback}</cr-checkbox>
       </div>
     </cr-dialog>
--- a/chrome/browser/signin/signin_promo.cc
+++ b/chrome/browser/signin/signin_promo.cc
@@ -171,7 +171,7 @@ bool IsAutoCloseEnabledInEmbeddedURL(con
 
 void RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterBooleanPref(prefs::kSignInPromoShowOnFirstRunAllowed, true);
+  registry->RegisterBooleanPref(prefs::kSignInPromoShowOnFirstRunAllowed, false);
   registry->RegisterBooleanPref(prefs::kSignInPromoShowNTPBubble, false);
   registry->RegisterIntegerPref(prefs::kDiceSigninUserMenuPromoCount, 0);
 }
--- a/components/bookmarks/browser/bookmark_utils.cc
+++ b/components/bookmarks/browser/bookmark_utils.cc
@@ -440,12 +440,12 @@ void GetBookmarksMatchingProperties(Book
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
       prefs::kShowBookmarkBar,
-      false,
+      true,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(prefs::kEditBookmarksEnabled, true);
   registry->RegisterBooleanPref(
       prefs::kShowAppsShortcutInBookmarkBar,
-      true,
+      false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(
       prefs::kShowManagedBookmarksInBookmarkBar,
--- a/chrome/browser/profiles/profile.cc
+++ b/chrome/browser/profiles/profile.cc
@@ -148,7 +148,7 @@ const char Profile::kProfileKey[] = "__P
 void Profile::RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
       prefs::kSearchSuggestEnabled,
-      true,
+      false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 #if defined(OS_ANDROID)
   registry->RegisterStringPref(
--- a/chrome/service/cloud_print/connector_settings.cc
+++ b/chrome/service/cloud_print/connector_settings.cc
@@ -60,7 +60,7 @@ void ConnectorSettings::InitFrom(Service
   DCHECK(server_url_.is_valid());
 
   connect_new_printers_ = prefs->GetBoolean(
-      prefs::kCloudPrintConnectNewPrinters, true);
+      prefs::kCloudPrintConnectNewPrinters, false);
 
   xmpp_ping_enabled_ = prefs->GetBoolean(
       prefs::kCloudPrintXmppPingEnabled, false);
--- a/chrome/browser/ui/webui/local_discovery/local_discovery_ui.cc
+++ b/chrome/browser/ui/webui/local_discovery/local_discovery_ui.cc
@@ -127,10 +127,6 @@ void LocalDiscoveryUI::RegisterProfilePr
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
       prefs::kLocalDiscoveryNotificationsEnabled,
-#if defined(OS_WIN)
       false,
-#else
-      true,
-#endif
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
--- a/extensions/common/extension.cc
+++ b/extensions/common/extension.cc
@@ -382,14 +382,6 @@ bool Extension::ShouldDisplayInExtension
   if (is_theme())
     return false;
 
-  // Hide component extensions because they are only extensions as an
-  // implementation detail of Chrome.
-  if (extensions::Manifest::IsComponentLocation(location()) &&
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kShowComponentExtensionOptions)) {
-    return false;
-  }
-
   // Unless they are unpacked, never show hosted apps. Note: We intentionally
   // show packaged apps and platform apps because there are some pieces of
   // functionality that are only available in chrome://extensions/ but which
--- a/components/safe_browsing/common/safe_browsing_prefs.cc
+++ b/components/safe_browsing/common/safe_browsing_prefs.cc
@@ -149,9 +149,9 @@ void RegisterProfilePrefs(PrefRegistrySi
   registry->RegisterBooleanPref(
       prefs::kSafeBrowsingSawInterstitialScoutReporting, false);
   registry->RegisterBooleanPref(
-      prefs::kSafeBrowsingExtendedReportingOptInAllowed, true);
+      prefs::kSafeBrowsingExtendedReportingOptInAllowed, false);
   registry->RegisterBooleanPref(
-      prefs::kSafeBrowsingEnabled, true,
+      prefs::kSafeBrowsingEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(prefs::kSafeBrowsingProceedAnywayDisabled,
                                 false);
--- a/components/password_manager/core/browser/password_manager.cc
+++ b/components/password_manager/core/browser/password_manager.cc
@@ -354,10 +354,10 @@ bool IsOnlyNewParserEnabled() {
 void PasswordManager::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
-      prefs::kCredentialsEnableService, true,
+      prefs::kCredentialsEnableService, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF);
   registry->RegisterBooleanPref(
-      prefs::kCredentialsEnableAutosignin, true,
+      prefs::kCredentialsEnableAutosignin, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF);
   registry->RegisterStringPref(prefs::kSyncPasswordHash, std::string(),
                                PrefRegistry::NO_REGISTRATION_FLAGS);
--- a/components/payments/core/payment_prefs.cc
+++ b/components/payments/core/payment_prefs.cc
@@ -16,7 +16,7 @@ const char kCanMakePaymentEnabled[] = "p
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(kPaymentsFirstTransactionCompleted, false);
   registry->RegisterBooleanPref(
-      kCanMakePaymentEnabled, true,
+      kCanMakePaymentEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
--- a/chrome/browser/signin/account_consistency_mode_manager.cc
+++ b/chrome/browser/signin/account_consistency_mode_manager.cc
@@ -126,7 +126,7 @@ void AccountConsistencyModeManager::Regi
   registry->RegisterBooleanPref(prefs::kAccountConsistencyMirrorRequired,
                                 false);
 #endif
-  registry->RegisterBooleanPref(prefs::kSigninAllowedOnNextStartup, true);
+  registry->RegisterBooleanPref(prefs::kSigninAllowedOnNextStartup, false);
 }
 
 // static