diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 8f687097bfac3d..854092d77d4655 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4978,9 +4978,6 @@ Even if you have downloaded files from this website before, the website might ha
           <message name="IDS_MANAGE_EXTENSION" desc="The 'Manage extensions' text in the context menu for when right-clicking on extension icons (sentence case).">
             Manage extensions
           </message>
-          <message name="IDS_USE_SIDEBAR" desc="The 'Manage extensions' text in the context menu for when right-clicking on extension icons (sentence case).">
-            Open in sidebar
-          </message>
           <message name="IDS_EXTENSION_ACTION_INSPECT_POPUP" desc="The text for the right-click menu of page and browser actions which shows the popup and opens the developer tools (sentence case).">
             Inspect popup
           </message>
@@ -4998,9 +4995,6 @@ Even if you have downloaded files from this website before, the website might ha
           <message name="IDS_EXTENSIONS_HIDE_BUTTON" desc="The text for the Hide context menu item (title case).">
             Hide Button
           </message>
-          <message name="IDS_USE_SIDEBAR" desc="The 'Manage extensions' text in the context menu for when right-clicking on extension icons (sentence case).">
-            Open in sidebar
-          </message>
           <message name="IDS_MANAGE_EXTENSION" desc="The 'Manage Extensions' text in the context menu for when right-clicking on extension icons (title case).">
             Manage Extensions
           </message>
diff --git a/chrome/browser/extensions/extension_context_menu_model.cc b/chrome/browser/extensions/extension_context_menu_model.cc
index 7d65c6f88869e9..e8e36d4f9c67c3 100644
--- a/chrome/browser/extensions/extension_context_menu_model.cc
+++ b/chrome/browser/extensions/extension_context_menu_model.cc
@@ -127,9 +127,6 @@ ExtensionContextMenuModel::ExtensionContextMenuModel(const Extension* extension,
 }
 
 bool ExtensionContextMenuModel::IsCommandIdChecked(int command_id) const {
-  if (command_id == SIDEBAR) {
-    return profile_->GetPrefs()->GetBoolean(prefs::kShowPopupInSidebar);
-  }
   if (command_id >= IDC_EXTENSIONS_CONTEXT_CUSTOM_FIRST &&
       command_id <= IDC_EXTENSIONS_CONTEXT_CUSTOM_LAST)
     return extension_items_->IsCommandIdChecked(command_id);
@@ -144,8 +141,6 @@ bool ExtensionContextMenuModel::IsCommandIdEnabled(int command_id) const {
   if (command_id >= IDC_EXTENSIONS_CONTEXT_CUSTOM_FIRST &&
       command_id <= IDC_EXTENSIONS_CONTEXT_CUSTOM_LAST) {
     return extension_items_->IsCommandIdEnabled(command_id);
-  } else if (command_id == SIDEBAR) {
-    return true;
   } else if (command_id == CONFIGURE) {
     return extensions::OptionsPageInfo::HasOptionsPage(extension);
   } else if (command_id == NAME) {
@@ -206,11 +201,6 @@ void ExtensionContextMenuModel::ExecuteCommand(int command_id,
       }
       break;
     }
-    case SIDEBAR: {
-        bool current = profile_->GetPrefs()->GetBoolean(prefs::kShowPopupInSidebar);
-        profile_->GetPrefs()->SetBoolean(prefs::kShowPopupInSidebar, !current);
-      }
-      break;
     case CONFIGURE:
       DCHECK(extensions::OptionsPageInfo::HasOptionsPage(extension));
       extensions::ExtensionTabUtil::OpenOptionsPage(extension, browser_);
@@ -298,7 +288,6 @@ void ExtensionContextMenuModel::InitMenu(const Extension* extension) {
           ->WantsToRun(extension)) {
     AddItemWithStringId(ALWAYS_RUN, IDS_EXTENSIONS_ALWAYS_RUN);
   }
-  AddCheckItem(SIDEBAR, l10n_util::GetStringUTF16(IDS_USE_SIDEBAR));
   AddItemWithStringId(CONFIGURE, IDS_EXTENSIONS_OPTIONS_MENU_ITEM);
   AddItem(UNINSTALL, l10n_util::GetStringUTF16(IDS_EXTENSIONS_UNINSTALL));
 
diff --git a/chrome/browser/extensions/extension_context_menu_model.h b/chrome/browser/extensions/extension_context_menu_model.h
index 86dfa14052e299..264c31d0bb39b1 100644
--- a/chrome/browser/extensions/extension_context_menu_model.h
+++ b/chrome/browser/extensions/extension_context_menu_model.h
@@ -35,7 +35,6 @@ class ExtensionContextMenuModel
   enum MenuEntries {
     NAME = 0,
     CONFIGURE,
-    SIDEBAR,
     TOGGLE_VISIBILITY,
     UNINSTALL,
     MANAGE,
diff --git a/chrome/browser/ui/browser_ui_prefs.cc b/chrome/browser/ui/browser_ui_prefs.cc
index b468b0be9ea662..0a47eddcd4f97d 100644
--- a/chrome/browser/ui/browser_ui_prefs.cc
+++ b/chrome/browser/ui/browser_ui_prefs.cc
@@ -32,10 +32,6 @@ void RegisterBrowserUserPrefs(user_prefs::PrefRegistrySyncable* registry) {
       prefs::kShowHomeButton,
       false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
-registry->RegisterBooleanPref(
-      prefs::kShowPopupInSidebar,
-      false,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 #if defined(OS_MACOSX)
   // This really belongs in platform code, but there's no good place to
   // initialize it between the time when the AppController is created
diff --git a/chrome/browser/ui/extensions/extension_action_view_controller.cc b/chrome/browser/ui/extensions/extension_action_view_controller.cc
index 47e6daa41e82fe..814795343b8450 100644
--- a/chrome/browser/ui/extensions/extension_action_view_controller.cc
+++ b/chrome/browser/ui/extensions/extension_action_view_controller.cc
@@ -288,9 +288,7 @@ bool ExtensionActionViewController::ShowPopupWithUrl(
   if (already_showing)
     return false;
 
-  bool use_sidebar =
-      browser()->profile()->GetPrefs()->GetBoolean(prefs::kShowPopupInSidebar) ||
-      extension_action_->open_in_sidebar();
+  bool use_sidebar = extension_action_->open_in_sidebar();
 
   if (use_sidebar) {
     SidebarManager* sidebar_manager = SidebarManager::GetInstance();
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index ee99b5b1277e6a..ed19baf95e6c51 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -836,10 +836,6 @@ const char kIpcDisabledMessages[] = "ipc_log_disabled_messages";
 // visible on the toolbar.
 const char kShowHomeButton[] = "browser.show_home_button";
 
-// A boolean pref set to true if an extension popup to open the pages should be
-// visible in the sidebar.
-const char kShowPopupInSidebar[] = "browser.show_home_popup_in_sidebar";
-
 // A string value which saves short list of recently user selected encodings
 // separated with comma punctuation mark.
 const char kRecentlySelectedEncoding[] = "profile.recently_selected_encodings";
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 3015f612b4ac0b..a5348d5a43c0de 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -275,7 +275,6 @@ extern const char kForceMaximizeOnFirstRun[];
 #endif  // defined(OS_CHROMEOS)
 extern const char kIpcDisabledMessages[];
 extern const char kShowHomeButton[];
-extern const char kShowPopupInSidebar[];
 extern const char kRecentlySelectedEncoding[];
 extern const char kDeleteBrowsingHistory[];
 extern const char kDeleteDownloadHistory[];