diff --git a/Telegram/SourceFiles/apiwrap.cpp b/Telegram/SourceFiles/apiwrap.cpp
index cea6bc17d..f4a2efc60 100644
--- a/Telegram/SourceFiles/apiwrap.cpp
+++ b/Telegram/SourceFiles/apiwrap.cpp
@@ -2708,39 +2708,6 @@ void ApiWrap::resolveWebPages() {
 	}
 }
 
-void ApiWrap::requestAttachedStickerSets(not_null<PhotoData*> photo) {
-	request(_attachedStickerSetsRequestId).cancel();
-	_attachedStickerSetsRequestId = request(MTPmessages_GetAttachedStickers(
-		MTP_inputStickeredMediaPhoto(photo->mtpInput())
-	)).done([=](const MTPVector<MTPStickerSetCovered> &result) {
-		if (result.v.isEmpty()) {
-			Ui::show(Box<InformBox>(tr::lng_stickers_not_found(tr::now)));
-			return;
-		} else if (result.v.size() > 1) {
-			Ui::show(Box<StickersBox>(_session, result));
-			return;
-		}
-		// Single attached sticker pack.
-		const auto setData = result.v.front().match([&](const auto &data) {
-			return data.vset().match([&](const MTPDstickerSet &data) {
-				return &data;
-			});
-		});
-
-		const auto setId = (setData->vid().v && setData->vaccess_hash().v)
-			? MTP_inputStickerSetID(setData->vid(), setData->vaccess_hash())
-			: MTP_inputStickerSetShortName(setData->vshort_name());
-		const auto &windows = _session->windows();
-		if (!windows.empty()) {
-			Ui::show(
-				Box<StickerSetBox>(windows.front(), setId),
-				Ui::LayerOption::KeepOther);
-		}
-	}).fail([=](const RPCError &error) {
-		Ui::show(Box<InformBox>(tr::lng_stickers_not_found(tr::now)));
-	}).send();
-}
-
 void ApiWrap::requestParticipantsCountDelayed(
 		not_null<ChannelData*> channel) {
 	_participantsCountRequestTimer.call(
diff --git a/Telegram/SourceFiles/apiwrap.h b/Telegram/SourceFiles/apiwrap.h
index f502f7f8d..f88e2ac3b 100644
--- a/Telegram/SourceFiles/apiwrap.h
+++ b/Telegram/SourceFiles/apiwrap.h
@@ -262,7 +262,6 @@ public:
 	void clearWebPageRequest(WebPageData *page);
 	void clearWebPageRequests();
 
-	void requestAttachedStickerSets(not_null<PhotoData*> photo);
 	void scheduleStickerSetRequest(uint64 setId, uint64 access);
 	void requestStickerSets();
 	void saveStickerSets(
@@ -847,8 +846,6 @@ private:
 	std::optional<bool> _contactSignupSilent;
 	rpl::event_stream<bool> _contactSignupSilentChanges;
 
-	mtpRequestId _attachedStickerSetsRequestId = 0;
-
 	base::flat_map<FullMsgId, QString> _unlikelyMessageLinks;
 
 };
diff --git a/Telegram/SourceFiles/boxes/background_preview_box.cpp b/Telegram/SourceFiles/boxes/background_preview_box.cpp
index 2aaeb3f6c..8de1d447a 100644
--- a/Telegram/SourceFiles/boxes/background_preview_box.cpp
+++ b/Telegram/SourceFiles/boxes/background_preview_box.cpp
@@ -399,7 +399,8 @@ BackgroundPreviewBox::BackgroundPreviewBox(
 	QWidget*,
 	not_null<Window::SessionController*> controller,
 	const Data::WallPaper &paper)
-: _controller(controller)
+: SimpleElementDelegate(controller)
+, _controller(controller)
 , _text1(GenerateTextItem(
 	delegate(),
 	_controller->session().data().history(
diff --git a/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp b/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
index cd904bc05..1ad6c8241 100644
--- a/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/add_participants_box.cpp
@@ -244,7 +244,7 @@ void AddParticipantsBoxController::Start(
 			box->boxClosing() | rpl::start_with_next([=] {
 				auto params = Window::SectionShow();
 				params.activation = anim::activation::background;
-				App::wnd()->sessionController()->showPeerHistory(
+				navigation->parentController()->showPeerHistory(
 					channel,
 					params,
 					ShowAtTheEndMsgId);
diff --git a/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
index c7138e4af..f46fd99af 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
@@ -83,7 +83,7 @@ class Controller {
 public:
 	Controller(
 		not_null<Ui::GenericBox*> box,
-		not_null<Window::Controller*> window,
+		not_null<Window::SessionController*> window,
 		not_null<UserData*> user);
 
 	void prepare();
@@ -100,7 +100,7 @@ private:
 		bool inverted);
 
 	not_null<Ui::GenericBox*> _box;
-	not_null<Window::Controller*> _window;
+	not_null<Window::SessionController*> _window;
 	not_null<UserData*> _user;
 	Ui::Checkbox *_sharePhone = nullptr;
 	QString _phone;
@@ -111,7 +111,7 @@ private:
 
 Controller::Controller(
 	not_null<Ui::GenericBox*> box,
-	not_null<Window::Controller*> window,
+	not_null<Window::SessionController*> window,
 	not_null<UserData*> user)
 : _box(box)
 , _window(window)
@@ -143,7 +143,7 @@ void Controller::setupCover() {
 		object_ptr<Info::Profile::Cover>(
 			_box,
 			_user,
-			_window->sessionController(),
+			_window,
 			(_phone.isEmpty()
 				? tr::lng_contact_mobile_hidden()
 				: rpl::single(App::formatPhone(_phone)))),
@@ -266,7 +266,7 @@ void Controller::setupSharePhoneNumber() {
 
 void EditContactBox(
 		not_null<Ui::GenericBox*> box,
-		not_null<Window::Controller*> window,
+		not_null<Window::SessionController*> window,
 		not_null<UserData*> user) {
 	box->lifetime().make_state<Controller>(box, window, user)->prepare();
 }
diff --git a/Telegram/SourceFiles/boxes/peers/edit_contact_box.h b/Telegram/SourceFiles/boxes/peers/edit_contact_box.h
index 3f3e2c776..3dc7d81f8 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_contact_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_contact_box.h
@@ -12,10 +12,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 class UserData;
 
 namespace Window {
-class Controller;
+class SessionController;
 } // namespace Window
 
 void EditContactBox(
 	not_null<Ui::GenericBox*> box,
-	not_null<Window::Controller*> window,
+	not_null<Window::SessionController*> window,
 	not_null<UserData*> user);
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
index 2d107db94..0b0801f48 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
@@ -193,9 +193,11 @@ void SaveSlowmodeSeconds(
 	api->registerModifyRequest(key, requestId);
 }
 
-void ShowEditPermissions(not_null<PeerData*> peer) {
+void ShowEditPermissions(
+		not_null<Window::SessionNavigation*> navigation,
+		not_null<PeerData*> peer) {
 	const auto box = Ui::show(
-		Box<EditPeerPermissionsBox>(peer),
+		Box<EditPeerPermissionsBox>(navigation, peer),
 		Ui::LayerOption::KeepOther);
 	const auto saving = box->lifetime().make_state<int>(0);
 	const auto save = [=](
@@ -562,7 +564,9 @@ object_ptr<Ui::RpWidget> Controller::createStickersEdit() {
 		tr::lng_group_stickers_add(tr::now),
 		st::editPeerInviteLinkButton)
 	)->addClickHandler([=] {
-		Ui::show(Box<StickersBox>(channel), Ui::LayerOption::KeepOther);
+		Ui::show(
+			Box<StickersBox>(_navigation->parentController(), channel),
+			Ui::LayerOption::KeepOther);
 	});
 
 	return result;
@@ -831,8 +835,6 @@ void Controller::fillHistoryVisibilityButton() {
 void Controller::fillManageSection() {
 	Expects(_controls.buttonsLayout != nullptr);
 
-	const auto navigation = App::wnd()->sessionController();
-
 	const auto chat = _peer->asChat();
 	const auto channel = _peer->asChannel();
 	const auto isChannel = (!chat);
@@ -944,7 +946,7 @@ void Controller::fillManageSection() {
 				Info::Profile::RestrictionsCountValue
 			) | rpl::flatten_latest(
 			) | ToPositiveNumberStringRestrictions(),
-			[=] { ShowEditPermissions(_peer); },
+			[=] { ShowEditPermissions(_navigation, _peer); },
 			st::infoIconPermissions);
 	}
 	if (canViewAdmins) {
@@ -959,7 +961,7 @@ void Controller::fillManageSection() {
 			) | ToPositiveNumberString(),
 			[=] {
 				ParticipantsBoxController::Start(
-					navigation,
+					_navigation,
 					_peer,
 					ParticipantsBoxController::Role::Admins);
 			},
@@ -977,7 +979,7 @@ void Controller::fillManageSection() {
 			) | ToPositiveNumberString(),
 			[=] {
 				ParticipantsBoxController::Start(
-					navigation,
+					_navigation,
 					_peer,
 					ParticipantsBoxController::Role::Members);
 			},
@@ -991,7 +993,7 @@ void Controller::fillManageSection() {
 			| ToPositiveNumberString(),
 			[=] {
 				ParticipantsBoxController::Start(
-					navigation,
+					_navigation,
 					_peer,
 					ParticipantsBoxController::Role::Kicked);
 			},
@@ -1003,7 +1005,7 @@ void Controller::fillManageSection() {
 			tr::lng_manage_peer_recent_actions(),
 			rpl::single(QString()), //Empty count.
 			[=] {
-				navigation->showSection(AdminLog::SectionMemento(channel));
+				_navigation->showSection(AdminLog::SectionMemento(channel));
 			},
 			st::infoIconRecentActions);
 	}
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
index c518e56f3..91c7431b6 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
@@ -307,8 +307,10 @@ ChatAdminRights FullAdminRights(bool isGroup) {
 
 EditPeerPermissionsBox::EditPeerPermissionsBox(
 	QWidget*,
+	not_null<Window::SessionNavigation*> navigation,
 	not_null<PeerData*> peer)
-: _peer(peer->migrateToOrMe()) {
+: _navigation(navigation)
+, _peer(peer->migrateToOrMe()) {
 }
 
 auto EditPeerPermissionsBox::saveEvents() const -> rpl::producer<Result> {
@@ -522,8 +524,6 @@ void EditPeerPermissionsBox::addBannedButtons(
 		}
 	}
 	const auto channel = _peer->asChannel();
-
-	const auto navigation = App::wnd()->sessionController();
 	container->add(EditPeerInfoBox::CreateButton(
 		container,
 		tr::lng_manage_peer_exceptions(),
@@ -532,7 +532,7 @@ void EditPeerPermissionsBox::addBannedButtons(
 			: rpl::single(0)) | ToPositiveNumberString(),
 		[=] {
 			ParticipantsBoxController::Start(
-				navigation,
+				_navigation,
 				_peer,
 				ParticipantsBoxController::Role::Restricted);
 		},
@@ -545,7 +545,7 @@ void EditPeerPermissionsBox::addBannedButtons(
 			| ToPositiveNumberString(),
 			[=] {
 				ParticipantsBoxController::Start(
-					navigation,
+					_navigation,
 					_peer,
 					ParticipantsBoxController::Role::Kicked);
 			},
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
index 4faf5e468..53f16ea38 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
@@ -15,9 +15,16 @@ class RoundButton;
 class VerticalLayout;
 } // namespace Ui
 
+namespace Window {
+class SessionNavigation;
+} // namespace Window
+
 class EditPeerPermissionsBox : public Ui::BoxContent {
 public:
-	EditPeerPermissionsBox(QWidget*, not_null<PeerData*> peer);
+	EditPeerPermissionsBox(
+		QWidget*,
+		not_null<Window::SessionNavigation*> navigation,
+		not_null<PeerData*> peer);
 
 	struct Result {
 		MTPDchatBannedRights::Flags rights;
@@ -34,7 +41,8 @@ private:
 	void addSlowmodeLabels(not_null<Ui::VerticalLayout*> container);
 	void addBannedButtons(not_null<Ui::VerticalLayout*> container);
 
-	not_null<PeerData*> _peer;
+	const not_null<Window::SessionNavigation*> _navigation;
+	const not_null<PeerData*> _peer;
 	Ui::RoundButton *_save = nullptr;
 	Fn<Result()> _value;
 
diff --git a/Telegram/SourceFiles/boxes/stickers_box.cpp b/Telegram/SourceFiles/boxes/stickers_box.cpp
index d533c5aaf..4654798e7 100644
--- a/Telegram/SourceFiles/boxes/stickers_box.cpp
+++ b/Telegram/SourceFiles/boxes/stickers_box.cpp
@@ -67,7 +67,6 @@ private:
 
 };
 
-
 // This class is hold in header because it requires Qt preprocessing.
 class StickersBox::Inner
 	: public Ui::RpWidget
@@ -77,9 +76,14 @@ public:
 
 	Inner(
 		QWidget *parent,
-		not_null<Main::Session*> session,
+		not_null<Window::SessionController*> controller,
 		Section section);
-	Inner(QWidget *parent, not_null<ChannelData*> megagroup);
+	Inner(
+		QWidget *parent,
+		not_null<Window::SessionController*> controller,
+		not_null<ChannelData*> megagroup);
+
+	[[nodiscard]] Main::Session &session() const;
 
 	base::Observable<int> scrollToY;
 	void setInnerFocus();
@@ -232,7 +236,7 @@ private:
 
 	int countMaxNameWidth() const;
 
-	const not_null<Main::Session*> _session;
+	const not_null<Window::SessionController*> _controller;
 	MTP::Sender _api;
 
 	Section _section;
@@ -359,26 +363,29 @@ void StickersBox::Tab::saveScrollTop() {
 
 StickersBox::StickersBox(
 	QWidget*,
-	not_null<Main::Session*> session,
+	not_null<Window::SessionController*> controller,
 	Section section)
-: _session(session)
-, _api(&session->mtp())
+: _controller(controller)
+, _api(&controller->session().mtp())
 , _tabs(this, st::stickersTabs)
 , _unreadBadge(
 	this,
-	_session->data().stickers().featuredSetsUnreadCountValue())
+	controller->session().data().stickers().featuredSetsUnreadCountValue())
 , _section(section)
-, _installed(0, this, session, Section::Installed)
-, _featured(1, this, session, Section::Featured)
-, _archived(2, this, session, Section::Archived) {
+, _installed(0, this, controller, Section::Installed)
+, _featured(1, this, controller, Section::Featured)
+, _archived(2, this, controller, Section::Archived) {
 	_tabs->setRippleTopRoundRadius(st::boxRadius);
 }
 
-StickersBox::StickersBox(QWidget*, not_null<ChannelData*> megagroup)
-: _session(&megagroup->session())
-, _api(&_session->mtp())
+StickersBox::StickersBox(
+	QWidget*,
+	not_null<Window::SessionController*> controller,
+	not_null<ChannelData*> megagroup)
+: _controller(controller)
+, _api(&controller->session().mtp())
 , _section(Section::Installed)
-, _installed(0, this, megagroup)
+, _installed(0, this, controller, megagroup)
 , _megagroupSet(megagroup) {
 	subscribe(_installed.widget()->scrollToY, [=](int y) {
 		onScrollToY(y);
@@ -387,15 +394,19 @@ StickersBox::StickersBox(QWidget*, not_null<ChannelData*> megagroup)
 
 StickersBox::StickersBox(
 	QWidget*,
-	not_null<Main::Session*> session,
+	not_null<Window::SessionController*> controller,
 	const MTPVector<MTPStickerSetCovered> &attachedSets)
-: _session(session)
-, _api(&session->mtp())
+: _controller(controller)
+, _api(&controller->session().mtp())
 , _section(Section::Attached)
-, _attached(0, this, session, Section::Attached)
+, _attached(0, this, controller, Section::Attached)
 , _attachedSets(attachedSets) {
 }
 
+Main::Session &StickersBox::session() const {
+	return _controller->session();
+}
+
 void StickersBox::showAttachedStickers() {
 	auto addedSet = false;
 	for (const auto &stickerSet : _attachedSets.v) {
@@ -405,11 +416,11 @@ void StickersBox::showAttachedStickers() {
 			});
 		});
 
-		if (const auto set = _session->data().stickers().feedSet(*setData)) {
+		if (const auto set = session().data().stickers().feedSet(*setData)) {
 			if (_attached.widget()->appendSet(set)) {
 				addedSet = true;
 				if (set->stickers.isEmpty() || (set->flags & MTPDstickerSet_ClientFlag::f_not_loaded)) {
-					_session->api().scheduleStickerSetRequest(set->id, set->access);
+					session().api().scheduleStickerSetRequest(set->id, set->access);
 				}
 			}
 		}
@@ -419,7 +430,7 @@ void StickersBox::showAttachedStickers() {
 	}
 
 	if (_section == Section::Attached && addedSet) {
-		_session->api().requestStickerSets();
+		session().api().requestStickerSets();
 	}
 }
 
@@ -433,7 +444,7 @@ void StickersBox::getArchivedDone(
 	}
 
 	auto &stickers = result.c_messages_archivedStickers();
-	auto &archived = _session->data().stickers().archivedSetsOrderRef();
+	auto &archived = session().data().stickers().archivedSetsOrderRef();
 	if (offsetId) {
 		auto index = archived.indexOf(offsetId);
 		if (index >= 0) {
@@ -463,7 +474,7 @@ void StickersBox::getArchivedDone(
 		}
 		if (!setData) continue;
 
-		if (const auto set = _session->data().stickers().feedSet(*setData)) {
+		if (const auto set = session().data().stickers().feedSet(*setData)) {
 			const auto index = archived.indexOf(set->id);
 			if (archived.isEmpty() || index != archived.size() - 1) {
 				changedSets = true;
@@ -475,7 +486,7 @@ void StickersBox::getArchivedDone(
 			if (_archived.widget()->appendSet(set)) {
 				addedSet = true;
 				if (set->stickers.isEmpty() || (set->flags & MTPDstickerSet_ClientFlag::f_not_loaded)) {
-					_session->api().scheduleStickerSetRequest(set->id, set->access);
+					session().api().scheduleStickerSetRequest(set->id, set->access);
 				}
 			}
 		}
@@ -493,14 +504,14 @@ void StickersBox::getArchivedDone(
 	refreshTabs();
 	_someArchivedLoaded = true;
 	if (_section == Section::Archived && addedSet) {
-		_session->api().requestStickerSets();
+		session().api().requestStickerSets();
 	}
 }
 
 void StickersBox::prepare() {
 	if (_section == Section::Installed) {
 		if (_tabs) {
-			_session->local().readArchivedStickers();
+			session().local().readArchivedStickers();
 		} else {
 			setTitle(tr::lng_stickers_group_set());
 		}
@@ -510,7 +521,7 @@ void StickersBox::prepare() {
 		setTitle(tr::lng_stickers_attached_sets());
 	}
 	if (_tabs) {
-		if (_session->data().stickers().archivedSetsOrder().isEmpty()) {
+		if (session().data().stickers().archivedSetsOrder().isEmpty()) {
 			preloadArchivedSets();
 		}
 		setNoContentMargin(true);
@@ -561,11 +572,11 @@ void StickersBox::prepare() {
 	setInnerWidget(_tab->takeWidget(), getTopSkip());
 	setDimensions(st::boxWideWidth, st::boxMaxListHeight);
 
-	_session->data().stickers().updated(
+	session().data().stickers().updated(
 	) | rpl::start_with_next(
 		[this] { handleStickersUpdated(); },
 		lifetime());
-	_session->api().updateStickers();
+	session().api().updateStickers();
 
 	if (_installed.widget()) {
 		_installed.widget()->draggingScrollDelta(
@@ -593,11 +604,11 @@ void StickersBox::refreshTabs() {
 	auto sections = QStringList();
 	sections.push_back(tr::lng_stickers_installed_tab(tr::now).toUpper());
 	_tabIndices.push_back(Section::Installed);
-	if (!_session->data().stickers().featuredSetsOrder().isEmpty()) {
+	if (!session().data().stickers().featuredSetsOrder().isEmpty()) {
 		sections.push_back(tr::lng_stickers_featured_tab(tr::now).toUpper());
 		_tabIndices.push_back(Section::Featured);
 	}
-	if (!_session->data().stickers().archivedSetsOrder().isEmpty()) {
+	if (!session().data().stickers().archivedSetsOrder().isEmpty()) {
 		sections.push_back(tr::lng_stickers_archived_tab(tr::now).toUpper());
 		_tabIndices.push_back(Section::Archived);
 	}
@@ -621,8 +632,8 @@ void StickersBox::loadMoreArchived() {
 	}
 
 	uint64 lastId = 0;
-	const auto &order = _session->data().stickers().archivedSetsOrder();
-	const auto &sets = _session->data().stickers().sets();
+	const auto &order = session().data().stickers().archivedSetsOrder();
+	const auto &sets = session().data().stickers().sets();
 	for (auto setIt = order.cend(), e = order.cbegin(); setIt != e;) {
 		--setIt;
 		auto it = sets.find(*setIt);
@@ -745,7 +756,7 @@ QPixmap StickersBox::grabContentCache() {
 }
 
 void StickersBox::installSet(uint64 setId) {
-	const auto &sets = _session->data().stickers().sets();
+	const auto &sets = session().data().stickers().sets();
 	const auto it = sets.find(setId);
 	if (it == sets.cend()) {
 		rebuildList();
@@ -771,24 +782,24 @@ void StickersBox::installSet(uint64 setId) {
 			installFail(error, setId);
 		}).send();
 
-		_session->data().stickers().installLocally(setId);
+		session().data().stickers().installLocally(setId);
 	}
 }
 
 void StickersBox::installDone(const MTPmessages_StickerSetInstallResult &result) {
 	if (result.type() == mtpc_messages_stickerSetInstallResultArchive) {
-		_session->data().stickers().applyArchivedResult(
+		session().data().stickers().applyArchivedResult(
 			result.c_messages_stickerSetInstallResultArchive());
 	}
 }
 
 void StickersBox::installFail(const RPCError &error, uint64 setId) {
-	const auto &sets = _session->data().stickers().sets();
+	const auto &sets = session().data().stickers().sets();
 	const auto it = sets.find(setId);
 	if (it == sets.cend()) {
 		rebuildList();
 	} else {
-		_session->data().stickers().undoInstallLocally(setId);
+		session().data().stickers().undoInstallLocally(setId);
 	}
 }
 
@@ -813,18 +824,18 @@ void StickersBox::requestArchivedSets() {
 		preloadArchivedSets();
 	}
 
-	const auto &sets = _session->data().stickers().sets();
-	const auto &order = _session->data().stickers().archivedSetsOrder();
+	const auto &sets = session().data().stickers().sets();
+	const auto &order = session().data().stickers().archivedSetsOrder();
 	for (const auto setId : order) {
 		auto it = sets.find(setId);
 		if (it != sets.cend()) {
 			const auto set = it->second.get();
 			if (set->stickers.isEmpty() && (set->flags & MTPDstickerSet_ClientFlag::f_not_loaded)) {
-				_session->api().scheduleStickerSetRequest(setId, set->access);
+				session().api().scheduleStickerSetRequest(setId, set->access);
 			}
 		}
 	}
-	_session->api().requestStickerSets();
+	session().api().requestStickerSets();
 }
 
 void StickersBox::resizeEvent(QResizeEvent *e) {
@@ -848,7 +859,7 @@ void StickersBox::handleStickersUpdated() {
 	} else {
 		_tab->widget()->updateRows();
 	}
-	if (_session->data().stickers().archivedSetsOrder().isEmpty()) {
+	if (session().data().stickers().archivedSetsOrder().isEmpty()) {
 		preloadArchivedSets();
 	} else {
 		refreshTabs();
@@ -875,9 +886,9 @@ void StickersBox::saveChanges() {
 	rebuildList(&_installed);
 
 	if (_someArchivedLoaded) {
-		_session->local().writeArchivedStickers();
+		session().local().writeArchivedStickers();
 	}
-	_session->api().saveStickerSets(_installed.widget()->getOrder(), _installed.widget()->getRemovedSets());
+	session().api().saveStickerSets(_installed.widget()->getOrder(), _installed.widget()->getRemovedSets());
 }
 
 void StickersBox::setInnerFocus() {
@@ -923,11 +934,11 @@ bool StickersBox::Inner::Row::isRecentSet() const {
 
 StickersBox::Inner::Inner(
 	QWidget *parent,
-	not_null<Main::Session*> session,
+	not_null<Window::SessionController*> controller,
 	StickersBox::Section section)
 : RpWidget(parent)
-, _session(session)
-, _api(&_session->mtp())
+, _controller(controller)
+, _api(&_controller->session().mtp())
 , _section(section)
 , _rowHeight(st::contactsPadding.top() + st::contactsPhotoSize + st::contactsPadding.bottom())
 , _shiftingAnimation([=](crl::time now) {
@@ -941,10 +952,13 @@ StickersBox::Inner::Inner(
 	setup();
 }
 
-StickersBox::Inner::Inner(QWidget *parent, not_null<ChannelData*> megagroup)
+StickersBox::Inner::Inner(
+	QWidget *parent,
+	not_null<Window::SessionController*> controller,
+	not_null<ChannelData*> megagroup)
 : RpWidget(parent)
-, _session(&megagroup->session())
-, _api(&_session->mtp())
+, _controller(controller)
+, _api(&_controller->session().mtp())
 , _section(StickersBox::Section::Installed)
 , _rowHeight(st::contactsPadding.top() + st::contactsPhotoSize + st::contactsPadding.bottom())
 , _shiftingAnimation([=](crl::time now) {
@@ -958,11 +972,11 @@ StickersBox::Inner::Inner(QWidget *parent, not_null<ChannelData*> megagroup)
 	st::groupStickersField,
 	rpl::single(qsl("stickerset")),
 	QString(),
-	_session->createInternalLink(QString()))
+	_controller->session().createInternalLink(QString()))
 , _megagroupDivider(this)
 , _megagroupSubTitle(this, tr::lng_stickers_group_from_your(tr::now), st::boxTitle) {
 	_megagroupSetField->setLinkPlaceholder(
-		_session->createInternalLink(qsl("addstickers/")));
+		_controller->session().createInternalLink(qsl("addstickers/")));
 	_megagroupSetField->setPlaceholderHidden(false);
 	_megagroupSetAddressChangedTimer.setCallback([this] { handleMegagroupSetAddressChange(); });
 	connect(
@@ -983,8 +997,12 @@ StickersBox::Inner::Inner(QWidget *parent, not_null<ChannelData*> megagroup)
 	setup();
 }
 
+Main::Session &StickersBox::Inner::session() const {
+	return _controller->session();
+}
+
 void StickersBox::Inner::setup() {
-	subscribe(_session->downloaderTaskFinished(), [this] {
+	subscribe(session().downloaderTaskFinished(), [this] {
 		update();
 		readVisibleSets();
 	});
@@ -1211,8 +1229,7 @@ void StickersBox::Inner::paintRowThumbnail(
 				size.width(),
 				size.height()),
 			frame);
-		const auto controller = App::wnd()->sessionController();
-		const auto paused = controller->isGifPausedAtLeastFor(
+		const auto paused = _controller->isGifPausedAtLeastFor(
 			Window::GifPauseReason::Layer);
 		if (!paused) {
 			row->lottie->markFrameShown();
@@ -1571,9 +1588,7 @@ void StickersBox::Inner::mouseReleaseEvent(QMouseEvent *e) {
 		const auto showSetByRow = [&](const Row &row) {
 			setSelected(SelectedRow());
 			Ui::show(
-				Box<StickerSetBox>(
-					App::wnd()->sessionController(),
-					row.set->mtpInput()),
+				Box<StickerSetBox>(_controller, row.set->mtpInput()),
 				Ui::LayerOption::KeepOther);
 		};
 		if (selectedIndex >= 0 && !_inDragArea) {
@@ -1602,8 +1617,8 @@ void StickersBox::Inner::saveGroupSet() {
 		? _megagroupSetInput.c_inputStickerSetID().vid().v
 		: 0;
 	if (newId != oldId) {
-		_session->api().setGroupStickerSet(_megagroupSet, _megagroupSetInput);
-		_session->api().stickerSetInstalled(Data::Stickers::MegagroupSetId);
+		session().api().setGroupStickerSet(_megagroupSet, _megagroupSetInput);
+		session().api().stickerSetInstalled(Data::Stickers::MegagroupSetId);
 	}
 }
 
@@ -1733,7 +1748,7 @@ void StickersBox::Inner::handleMegagroupSetAddressChange() {
 	auto text = _megagroupSetField->getLastText().trimmed();
 	if (text.isEmpty()) {
 		if (_megagroupSelectedSet) {
-			const auto &sets = _session->data().stickers().sets();
+			const auto &sets = session().data().stickers().sets();
 			const auto it = sets.find(_megagroupSelectedSet->set->id);
 			if (it != sets.cend() && !it->second->shortName.isEmpty()) {
 				setMegagroupSelectedSet(MTP_inputStickerSetEmpty());
@@ -1744,7 +1759,7 @@ void StickersBox::Inner::handleMegagroupSetAddressChange() {
 			MTP_inputStickerSetShortName(MTP_string(text))
 		)).done([=](const MTPmessages_StickerSet &result) {
 			_megagroupSetRequestId = 0;
-			auto set = _session->data().stickers().feedSetFull(result);
+			auto set = session().data().stickers().feedSetFull(result);
 			setMegagroupSelectedSet(MTP_inputStickerSetID(
 				MTP_long(set->id),
 				MTP_long(set->access)));
@@ -1771,11 +1786,11 @@ void StickersBox::Inner::rebuildMegagroupSet() {
 	}
 	auto &inputId = _megagroupSetInput.c_inputStickerSetID();
 	auto setId = inputId.vid().v;
-	const auto &sets = _session->data().stickers().sets();
+	const auto &sets = session().data().stickers().sets();
 	auto it = sets.find(setId);
 	if (it == sets.cend()
 		|| (it->second->flags & MTPDstickerSet_ClientFlag::f_not_loaded)) {
-		_session->api().scheduleStickerSetRequest(
+		session().api().scheduleStickerSetRequest(
 			inputId.vid().v,
 			inputId.vaccess_hash().v);
 		return;
@@ -1834,22 +1849,22 @@ void StickersBox::Inner::rebuild() {
 	clear();
 	const auto &order = ([&]() -> const StickersSetsOrder & {
 		if (_section == Section::Installed) {
-			auto &result = _session->data().stickers().setsOrder();
+			auto &result = session().data().stickers().setsOrder();
 			if (_megagroupSet && result.empty()) {
-				return _session->data().stickers().featuredSetsOrder();
+				return session().data().stickers().featuredSetsOrder();
 			}
 			return result;
 		} else if (_section == Section::Featured) {
-			return _session->data().stickers().featuredSetsOrder();
+			return session().data().stickers().featuredSetsOrder();
 		}
-		return _session->data().stickers().archivedSetsOrder();
+		return session().data().stickers().archivedSetsOrder();
 	})();
 	_rows.reserve(order.size() + 1);
 	_shiftingStartTimes.reserve(order.size() + 1);
 
-	const auto &sets = _session->data().stickers().sets();
+	const auto &sets = session().data().stickers().sets();
 	if (_megagroupSet) {
-		auto usingFeatured = _session->data().stickers().setsOrder().empty();
+		auto usingFeatured = session().data().stickers().setsOrder().empty();
 		_megagroupSubTitle->setText(usingFeatured
 			? tr::lng_stickers_group_from_featured(tr::now)
 			: tr::lng_stickers_group_from_your(tr::now));
@@ -1871,10 +1886,10 @@ void StickersBox::Inner::rebuild() {
 
 		if (set->stickers.isEmpty()
 			|| (set->flags & MTPDstickerSet_ClientFlag::f_not_loaded)) {
-			_session->api().scheduleStickerSetRequest(set->id, set->access);
+			session().api().scheduleStickerSetRequest(set->id, set->access);
 		}
 	}
-	_session->api().requestStickerSets();
+	session().api().requestStickerSets();
 	updateSize();
 }
 
@@ -1899,7 +1914,7 @@ void StickersBox::Inner::updateSize(int newWidth) {
 
 void StickersBox::Inner::updateRows() {
 	int maxNameWidth = countMaxNameWidth();
-	const auto &sets = _session->data().stickers().sets();
+	const auto &sets = session().data().stickers().sets();
 	for (const auto &row : _rows) {
 		const auto it = sets.find(row->set->id);
 		if (it == sets.cend()) {
@@ -2046,18 +2061,18 @@ int StickersBox::Inner::fillSetCount(not_null<StickersSet*> set) const {
 		: set->stickers.size();
 	auto added = 0;
 	if (set->id == Data::Stickers::CloudRecentSetId) {
-		const auto &sets = _session->data().stickers().sets();
+		const auto &sets = session().data().stickers().sets();
 		auto customIt = sets.find(Data::Stickers::CustomSetId);
 		if (customIt != sets.cend()) {
 			added = customIt->second->stickers.size();
-			const auto &recent = _session->data().stickers().getRecentPack();
+			const auto &recent = session().data().stickers().getRecentPack();
 			for (const auto &sticker : recent) {
 				if (customIt->second->stickers.indexOf(sticker.first) < 0) {
 					++added;
 				}
 			}
 		} else {
-			added = _session->data().stickers().getRecentPack().size();
+			added = session().data().stickers().getRecentPack().size();
 		}
 	}
 	return result + added;
@@ -2204,7 +2219,7 @@ void StickersBox::Inner::readVisibleSets() {
 			? (row->stickerMedia && row->stickerMedia->loaded())
 			: true;
 		if (!thumbnailLoading || thumbnailLoaded) {
-			_session->api().readFeaturedSetDelayed(row->set->id);
+			session().api().readFeaturedSetDelayed(row->set->id);
 		}
 	}
 }
diff --git a/Telegram/SourceFiles/boxes/stickers_box.h b/Telegram/SourceFiles/boxes/stickers_box.h
index 46977553e..e2050940c 100644
--- a/Telegram/SourceFiles/boxes/stickers_box.h
+++ b/Telegram/SourceFiles/boxes/stickers_box.h
@@ -29,6 +29,10 @@ class CrossButton;
 class BoxContentDivider;
 } // namespace Ui
 
+namespace Window {
+class SessionController;
+} // namespace Window
+
 namespace Main {
 class Session;
 } // namespace Main
@@ -56,15 +60,20 @@ public:
 
 	StickersBox(
 		QWidget*,
-		not_null<Main::Session*> session,
+		not_null<Window::SessionController*> controller,
 		Section section);
-	StickersBox(QWidget*, not_null<ChannelData*> megagroup);
 	StickersBox(
 		QWidget*,
-		not_null<Main::Session*> session,
+		not_null<Window::SessionController*> controller,
+		not_null<ChannelData*> megagroup);
+	StickersBox(
+		QWidget*,
+		not_null<Window::SessionController*> controller,
 		const MTPVector<MTPStickerSetCovered> &attachedSets);
 	~StickersBox();
 
+	[[nodiscard]] Main::Session &session() const;
+
 	void setInnerFocus() override;
 
 protected:
@@ -123,7 +132,7 @@ private:
 		uint64 offsetId);
 	void showAttachedStickers();
 
-	const not_null<Main::Session*> _session;
+	const not_null<Window::SessionController*> _controller;
 	MTP::Sender _api;
 
 	object_ptr<Ui::SettingsSlider> _tabs = { nullptr };
diff --git a/Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp b/Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp
index 303d8f52e..85f9b2e75 100644
--- a/Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp
+++ b/Telegram/SourceFiles/chat_helpers/stickers_list_widget.cpp
@@ -529,7 +529,7 @@ void StickersListWidget::Footer::mousePressEvent(QMouseEvent *e) {
 
 	if (_iconOver == SpecialOver::Settings) {
 		Ui::show(Box<StickersBox>(
-			&_pan->session(),
+			_pan->controller(),
 			(hasOnlyFeaturedSets()
 				? StickersBox::Section::Featured
 				: StickersBox::Section::Installed)));
@@ -886,9 +886,8 @@ StickersListWidget::StickersListWidget(
 	setAttribute(Qt::WA_OpaquePaintEvent);
 
 	_settings->addClickHandler([=] {
-		Ui::show(Box<StickersBox>(
-			&controller->session(),
-			StickersBox::Section::Installed));
+		Ui::show(
+			Box<StickersBox>(controller, StickersBox::Section::Installed));
 	});
 
 	subscribe(session().downloaderTaskFinished(), [=] {
@@ -2107,7 +2106,7 @@ void StickersListWidget::mouseReleaseEvent(QMouseEvent *e) {
 				removeSet(sets[button->section].id);
 			}
 		} else if (base::get_if<OverGroupAdd>(&pressed)) {
-			Ui::show(Box<StickersBox>(_megagroupSet));
+			Ui::show(Box<StickersBox>(controller(), _megagroupSet));
 		}
 	}
 }
@@ -2921,7 +2920,7 @@ void StickersListWidget::displaySet(uint64 setId) {
 		if (_megagroupSet->canEditStickers()) {
 			_displayingSet = true;
 			checkHideWithBox(Ui::show(
-				Box<StickersBox>(_megagroupSet),
+				Box<StickersBox>(controller(), _megagroupSet),
 				Ui::LayerOption::KeepOther).data());
 			return;
 		} else if (_megagroupSet->mgInfo->stickerSet.type() == mtpc_inputStickerSetID) {
diff --git a/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp b/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp
index 35906e55e..72f47e020 100644
--- a/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp
+++ b/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp
@@ -587,6 +587,10 @@ void InnerWidget::elementShowTooltip(
 	Fn<void()> hiddenCallback) {
 }
 
+bool InnerWidget::elementIsGifPaused() {
+	return _controller->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+}
+
 void InnerWidget::saveState(not_null<SectionMemento*> memento) {
 	memento->setFilter(std::move(_filter));
 	memento->setAdmins(std::move(_admins));
diff --git a/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h b/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h
index 177396075..f3c90b493 100644
--- a/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h
+++ b/Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h
@@ -111,6 +111,7 @@ public:
 	void elementShowTooltip(
 		const TextWithEntities &text,
 		Fn<void()> hiddenCallback) override;
+	bool elementIsGifPaused() override;
 
 	~InnerWidget();
 
diff --git a/Telegram/SourceFiles/history/history_inner_widget.cpp b/Telegram/SourceFiles/history/history_inner_widget.cpp
index 33403d634..7e941ae86 100644
--- a/Telegram/SourceFiles/history/history_inner_widget.cpp
+++ b/Telegram/SourceFiles/history/history_inner_widget.cpp
@@ -1545,6 +1545,7 @@ void HistoryInner::showContextMenu(QContextMenuEvent *e, bool showFromTouch) {
 
 	_menu = base::make_unique_q<Ui::PopupMenu>(this);
 	const auto session = &this->session();
+	const auto controller = _controller;
 
 	const auto addItemActions = [&](HistoryItem *item) {
 		if (!item
@@ -1584,7 +1585,7 @@ void HistoryInner::showContextMenu(QContextMenuEvent *e, bool showFromTouch) {
 		});
 		if (photo->hasSticker) {
 			_menu->addAction(tr::lng_context_attached_stickers(tr::now), [=] {
-				session->api().requestAttachedStickerSets(photo);
+				controller->requestAttachedStickerSets(photo);
 			});
 		}
 	};
@@ -2524,6 +2525,10 @@ void HistoryInner::elementShowTooltip(
 	_widget->showInfoTooltip(text, std::move(hiddenCallback));
 }
 
+bool HistoryInner::elementIsGifPaused() {
+	return _controller->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+}
+
 auto HistoryInner::getSelectionState() const
 -> HistoryView::TopBarWidget::SelectedState {
 	auto result = HistoryView::TopBarWidget::SelectedState {};
@@ -3386,6 +3391,9 @@ not_null<HistoryView::ElementDelegate*> HistoryInner::ElementDelegate() {
 				Instance->elementShowTooltip(text, hiddenCallback);
 			}
 		}
+		bool elementIsGifPaused() override {
+			return Instance ? Instance->elementIsGifPaused() : false;
+		}
 
 	};
 
diff --git a/Telegram/SourceFiles/history/history_inner_widget.h b/Telegram/SourceFiles/history/history_inner_widget.h
index 9c369638e..a97a38d1c 100644
--- a/Telegram/SourceFiles/history/history_inner_widget.h
+++ b/Telegram/SourceFiles/history/history_inner_widget.h
@@ -91,6 +91,7 @@ public:
 	void elementShowTooltip(
 		const TextWithEntities &text,
 		Fn<void()> hiddenCallback);
+	bool elementIsGifPaused();
 
 	void updateBotInfo(bool recount = true);
 
diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index ecccead6e..925d08a9c 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -855,6 +855,7 @@ void HistoryWidget::supportShareContact(Support::Contact contact) {
 			action);
 	};
 	const auto box = Ui::show(Box<Support::ConfirmContactBox>(
+		controller(),
 		_history,
 		contact,
 		crl::guard(this, submit)));
@@ -1868,7 +1869,7 @@ void HistoryWidget::showHistory(
 		_channel = peerToChannel(_peer->id);
 		_canSendMessages = _peer->canWrite();
 		_contactStatus = std::make_unique<HistoryView::ContactStatus>(
-			&controller()->window(),
+			controller(),
 			this,
 			_peer);
 		_contactStatus->heightValue() | rpl::start_with_next([=] {
diff --git a/Telegram/SourceFiles/history/view/history_view_contact_status.cpp b/Telegram/SourceFiles/history/view/history_view_contact_status.cpp
index 0c8d3340a..a1179a9f9 100644
--- a/Telegram/SourceFiles/history/view/history_view_contact_status.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_contact_status.cpp
@@ -178,10 +178,10 @@ void ContactStatus::Bar::updateButtonsGeometry() {
 }
 
 ContactStatus::ContactStatus(
-	not_null<Window::Controller*> window,
+	not_null<Window::SessionController*> window,
 	not_null<Ui::RpWidget*> parent,
 	not_null<PeerData*> peer)
-: _window(window)
+: _controller(window)
 , _bar(parent, object_ptr<Bar>(parent, peer->shortName()))
 , _shadow(parent) {
 	setupWidgets(parent);
@@ -294,15 +294,15 @@ void ContactStatus::setupHandlers(not_null<PeerData*> peer) {
 void ContactStatus::setupAddHandler(not_null<UserData*> user) {
 	_bar.entity()->addClicks(
 	) | rpl::start_with_next([=] {
-		_window->show(Box(EditContactBox, _window, user));
+		_controller->window().show(Box(EditContactBox, _controller, user));
 	}, _bar.lifetime());
 }
 
 void ContactStatus::setupBlockHandler(not_null<UserData*> user) {
 	_bar.entity()->blockClicks(
 	) | rpl::start_with_next([=] {
-		_window->show(
-			Box(Window::PeerMenuBlockUserBox, _window, user, true));
+		_controller->window().show(
+			Box(Window::PeerMenuBlockUserBox, &_controller->window(), user, true));
 	}, _bar.lifetime());
 }
 
@@ -326,7 +326,7 @@ void ContactStatus::setupShareHandler(not_null<UserData*> user) {
 				(*box)->closeBox();
 			}
 		};
-		*box = _window->show(Box<ConfirmBox>(
+		*box = _controller->window().show(Box<ConfirmBox>(
 			tr::lng_new_contact_share_sure(
 				tr::now,
 				lt_phone,
@@ -365,7 +365,7 @@ void ContactStatus::setupReportHandler(not_null<PeerData*> peer) {
 			Ui::Toast::Show(tr::lng_report_spam_done(tr::now));
 
 			// Destroys _bar.
-			_window->sessionController()->showBackFromStack();
+			_controller->showBackFromStack();
 		});
 		if (const auto user = peer->asUser()) {
 			peer->session().api().blockUser(user);
@@ -373,7 +373,7 @@ void ContactStatus::setupReportHandler(not_null<PeerData*> peer) {
 		const auto text = ((peer->isChat() || peer->isMegagroup())
 			? tr::lng_report_spam_sure_group
 			: tr::lng_report_spam_sure_channel)(tr::now);
-		_window->show(Box<ConfirmBox>(
+		_controller->window().show(Box<ConfirmBox>(
 			text,
 			tr::lng_report_spam_ok(tr::now),
 			st::attentionBoxButton,
diff --git a/Telegram/SourceFiles/history/view/history_view_contact_status.h b/Telegram/SourceFiles/history/view/history_view_contact_status.h
index e75198d8d..4279ecdc9 100644
--- a/Telegram/SourceFiles/history/view/history_view_contact_status.h
+++ b/Telegram/SourceFiles/history/view/history_view_contact_status.h
@@ -12,7 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/shadow.h"
 
 namespace Window {
-class Controller;
+class SessionController;
 } // namespace Window
 
 namespace Ui {
@@ -25,7 +25,7 @@ namespace HistoryView {
 class ContactStatus final {
 public:
 	ContactStatus(
-		not_null<Window::Controller*> window,
+		not_null<Window::SessionController*> controller,
 		not_null<Ui::RpWidget*> parent,
 		not_null<PeerData*> peer);
 
@@ -87,7 +87,7 @@ private:
 
 	static rpl::producer<State> PeerState(not_null<PeerData*> peer);
 
-	not_null<Window::Controller*> _window;
+	const not_null<Window::SessionController*> _controller;
 	State _state = State::None;
 	Ui::SlideWrap<Bar> _bar;
 	Ui::PlainShadow _shadow;
diff --git a/Telegram/SourceFiles/history/view/history_view_element.cpp b/Telegram/SourceFiles/history/view/history_view_element.cpp
index 1e9f793c0..7963dcfaa 100644
--- a/Telegram/SourceFiles/history/view/history_view_element.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_element.cpp
@@ -20,6 +20,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/core_settings.h"
 #include "main/main_session.h"
 #include "chat_helpers/stickers_emoji_pack.h"
+#include "window/window_session_controller.h"
 #include "data/data_session.h"
 #include "data/data_groups.h"
 #include "data/data_media_types.h"
@@ -55,6 +56,10 @@ bool IsAttachedToPreviousInSavedMessages(
 
 } // namespace
 
+SimpleElementDelegate::SimpleElementDelegate(
+	not_null<Window::SessionController*> controller)
+: _controller(controller) {
+}
 
 std::unique_ptr<HistoryView::Element> SimpleElementDelegate::elementCreate(
 		not_null<HistoryMessage*> message,
@@ -103,6 +108,10 @@ void SimpleElementDelegate::elementShowTooltip(
 	Fn<void()> hiddenCallback) {
 }
 
+bool SimpleElementDelegate::elementIsGifPaused() {
+	return _controller->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+}
+
 TextSelection UnshiftItemSelection(
 		TextSelection selection,
 		uint16 byLength) {
diff --git a/Telegram/SourceFiles/history/view/history_view_element.h b/Telegram/SourceFiles/history/view/history_view_element.h
index 264fbb898..99f0f98b5 100644
--- a/Telegram/SourceFiles/history/view/history_view_element.h
+++ b/Telegram/SourceFiles/history/view/history_view_element.h
@@ -17,6 +17,10 @@ class HistoryItem;
 class HistoryMessage;
 class HistoryService;
 
+namespace Window {
+class SessionController;
+} // namespace Window
+
 namespace HistoryView {
 
 enum class PointState : char;
@@ -57,11 +61,15 @@ public:
 	virtual void elementShowTooltip(
 		const TextWithEntities &text,
 		Fn<void()> hiddenCallback) = 0;
+	virtual bool elementIsGifPaused() = 0;
 
 };
 
 class SimpleElementDelegate : public ElementDelegate {
 public:
+	explicit SimpleElementDelegate(
+		not_null<Window::SessionController*> controller);
+
 	std::unique_ptr<Element> elementCreate(
 		not_null<HistoryMessage*> message,
 		Element *replacing = nullptr) override;
@@ -83,6 +91,10 @@ public:
 	void elementShowTooltip(
 		const TextWithEntities &text,
 		Fn<void()> hiddenCallback) override;
+	bool elementIsGifPaused() override;
+
+private:
+	const not_null<Window::SessionController*> _controller;
 
 };
 
diff --git a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
index 4c915162e..ee3ff1e2b 100644
--- a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
@@ -1165,6 +1165,10 @@ void ListWidget::elementShowTooltip(
 	Fn<void()> hiddenCallback) {
 }
 
+bool ListWidget::elementIsGifPaused() {
+	return _controller->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+}
+
 void ListWidget::saveState(not_null<ListMemento*> memento) {
 	memento->setAroundPosition(_aroundPosition);
 	auto state = countScrollState();
diff --git a/Telegram/SourceFiles/history/view/history_view_list_widget.h b/Telegram/SourceFiles/history/view/history_view_list_widget.h
index a36122faa..3912f7ee1 100644
--- a/Telegram/SourceFiles/history/view/history_view_list_widget.h
+++ b/Telegram/SourceFiles/history/view/history_view_list_widget.h
@@ -204,6 +204,7 @@ public:
 	void elementShowTooltip(
 		const TextWithEntities &text,
 		Fn<void()> hiddenCallback) override;
+	bool elementIsGifPaused() override;
 
 	~ListWidget();
 
diff --git a/Telegram/SourceFiles/history/view/media/history_view_gif.cpp b/Telegram/SourceFiles/history/view/media/history_view_gif.cpp
index 15dbe6c97..c73ac810c 100644
--- a/Telegram/SourceFiles/history/view/media/history_view_gif.cpp
+++ b/Telegram/SourceFiles/history/view/media/history_view_gif.cpp
@@ -282,7 +282,7 @@ void Gif::draw(Painter &p, const QRect &r, TextSelection selection, crl::time ms
 	const auto loaded = dataLoaded();
 	const auto displayLoading = item->isSending() || _data->displayLoading();
 	const auto selected = (selection == FullSelection);
-	const auto autoPaused = App::wnd()->sessionController()->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+	const auto autoPaused = _parent->delegate()->elementIsGifPaused();
 	const auto cornerDownload = downloadInCorner();
 	const auto canBePlayed = _dataMedia->canBePlayed();
 	const auto autoplay = autoplayEnabled()
@@ -902,7 +902,7 @@ void Gif::drawGrouped(
 	const auto loaded = dataLoaded();
 	const auto displayLoading = (item->id < 0) || _data->displayLoading();
 	const auto selected = (selection == FullSelection);
-	const auto autoPaused = App::wnd()->sessionController()->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+	const auto autoPaused = _parent->delegate()->elementIsGifPaused();
 	const auto fullFeatured = fullFeaturedGrouped(sides);
 	const auto cornerDownload = fullFeatured && downloadInCorner();
 	const auto canBePlayed = _dataMedia->canBePlayed();
@@ -1465,8 +1465,7 @@ void Gif::repaintStreamedContent() {
 	if (own && !own->frozenFrame.isNull()) {
 		return;
 	}
-	if (App::wnd()->sessionController()->isGifPausedAtLeastFor(Window::GifPauseReason::Any)
-		&& !activeRoundStreamed()) {
+	if (_parent->delegate()->elementIsGifPaused() && !activeRoundStreamed()) {
 		return;
 	}
 	history()->owner().requestViewRepaint(_parent);
diff --git a/Telegram/SourceFiles/history/view/media/history_view_sticker.cpp b/Telegram/SourceFiles/history/view/media/history_view_sticker.cpp
index 946cd76e1..bf4e856e9 100644
--- a/Telegram/SourceFiles/history/view/media/history_view_sticker.cpp
+++ b/Telegram/SourceFiles/history/view/media/history_view_sticker.cpp
@@ -185,7 +185,7 @@ void Sticker::paintLottie(Painter &p, const QRect &r, bool selected) {
 		return;
 	}
 
-	const auto paused = App::wnd()->sessionController()->isGifPausedAtLeastFor(Window::GifPauseReason::Any);
+	const auto paused = _parent->delegate()->elementIsGifPaused();
 	const auto playOnce = (_diceIndex > 0)
 		? true
 		: (_diceIndex == 0)
diff --git a/Telegram/SourceFiles/info/profile/info_profile_actions.cpp b/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
index ad7d70d30..63bd1209b 100644
--- a/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
+++ b/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
@@ -277,12 +277,12 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 			UsernameValue(user),
 			tr::lng_context_copy_mention(tr::now));
 
-		const auto window = &_controller->parentController()->window();
+		const auto controller = _controller->parentController();
 		AddMainButton(
 			result,
 			tr::lng_info_add_as_contact(),
 			CanAddContactValue(user),
-			[=] { window->show(Box(EditContactBox, window, user)); },
+			[=] { controller->window().show(Box(EditContactBox, controller, user)); },
 			tracker);
 	} else {
 		auto linkText = LinkValue(
@@ -507,12 +507,12 @@ void ActionsFiller::addShareContactAction(not_null<UserData*> user) {
 }
 
 void ActionsFiller::addEditContactAction(not_null<UserData*> user) {
-	const auto window = &_controller->parentController()->window();
+	const auto controller = _controller->parentController();
 	AddActionButton(
 		_wrap,
 		tr::lng_info_edit_contact(),
 		IsContactValue(user),
-		[=] { window->show(Box(EditContactBox, window, user)); });
+		[=] { controller->window().show(Box(EditContactBox, controller, user)); });
 }
 
 void ActionsFiller::addDeleteContactAction(
diff --git a/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp b/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp
index c9ff58589..ce928368c 100644
--- a/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp
+++ b/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp
@@ -1523,8 +1523,12 @@ void OverlayWidget::onAttachedStickers() {
 	if (!session) {
 		return;
 	}
+	const auto &active = _session->windows();
+	if (active.empty()) {
+		return;
+	}
 	close();
-	session->api().requestAttachedStickerSets(_photo);
+	active.front()->requestAttachedStickerSets(_photo);
 }
 
 auto OverlayWidget::sharedMediaType() const
diff --git a/Telegram/SourceFiles/settings/settings_chat.cpp b/Telegram/SourceFiles/settings/settings_chat.cpp
index a8f9b9353..1fa2a6049 100644
--- a/Telegram/SourceFiles/settings/settings_chat.cpp
+++ b/Telegram/SourceFiles/settings/settings_chat.cpp
@@ -722,7 +722,8 @@ void SetupStickersEmoji(
 		&st::settingsIconStickers,
 		st::settingsChatIconLeft
 	)->addClickHandler([=] {
-		Ui::show(Box<StickersBox>(session, StickersBox::Section::Installed));
+		Ui::show(
+			Box<StickersBox>(controller, StickersBox::Section::Installed));
 	});
 
 	AddButton(
diff --git a/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp b/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
index ab08a5789..2963d98a8 100644
--- a/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
+++ b/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
@@ -689,7 +689,8 @@ rpl::producer<QString> CallsPeer2PeerPrivacyController::exceptionsDescription()
 
 ForwardsPrivacyController::ForwardsPrivacyController(
 	not_null<Window::SessionController*> controller)
-: _controller(controller) {
+: SimpleElementDelegate(controller)
+, _controller(controller) {
 }
 
 ApiWrap::Privacy::Key ForwardsPrivacyController::key() {
diff --git a/Telegram/SourceFiles/support/support_autocomplete.cpp b/Telegram/SourceFiles/support/support_autocomplete.cpp
index 5fddeea3d..19fd00770 100644
--- a/Telegram/SourceFiles/support/support_autocomplete.cpp
+++ b/Telegram/SourceFiles/support/support_autocomplete.cpp
@@ -504,10 +504,12 @@ void Autocomplete::submitValue(const QString &value) {
 
 ConfirmContactBox::ConfirmContactBox(
 	QWidget*,
+	not_null<Window::SessionController*> controller,
 	not_null<History*> history,
 	const Contact &data,
 	Fn<void(Qt::KeyboardModifiers)> submit)
-: _comment(GenerateCommentItem(this, history, data))
+: SimpleElementDelegate(controller)
+, _comment(GenerateCommentItem(this, history, data))
 , _contact(GenerateContactItem(this, history, data))
 , _submit(submit) {
 }
diff --git a/Telegram/SourceFiles/support/support_autocomplete.h b/Telegram/SourceFiles/support/support_autocomplete.h
index 903c46083..bcc961a98 100644
--- a/Telegram/SourceFiles/support/support_autocomplete.h
+++ b/Telegram/SourceFiles/support/support_autocomplete.h
@@ -17,6 +17,10 @@ namespace Main {
 class Session;
 } // namespace Main
 
+namespace Window {
+class SessionController;
+} // namespace Window
+
 namespace Ui {
 class ScrollArea;
 class InputField;
@@ -65,6 +69,7 @@ class ConfirmContactBox
 public:
 	ConfirmContactBox(
 		QWidget*,
+		not_null<Window::SessionController*> controller,
 		not_null<History*> history,
 		const Contact &data,
 		Fn<void(Qt::KeyboardModifiers)> submit);
diff --git a/Telegram/SourceFiles/window/window_main_menu.cpp b/Telegram/SourceFiles/window/window_main_menu.cpp
index d194c7fa9..1ad785daf 100644
--- a/Telegram/SourceFiles/window/window_main_menu.cpp
+++ b/Telegram/SourceFiles/window/window_main_menu.cpp
@@ -827,12 +827,12 @@ void MainMenu::refreshMenu() {
 		}, &st::mainMenuContacts, &st::mainMenuContactsOver);
 		if (_controller->session().serverConfig().phoneCallsEnabled.current()) {
 			_menu->addAction(tr::lng_menu_calls(tr::now), [=] {
-				Ui::show(Box<PeerListBox>(std::make_unique<Calls::BoxController>(controller), [](not_null<PeerListBox*> box) {
+				Ui::show(Box<PeerListBox>(std::make_unique<Calls::BoxController>(controller), [=](not_null<PeerListBox*> box) {
 					box->addButton(tr::lng_close(), [=] {
 						box->closeBox();
 					});
 					box->addTopButton(st::callSettingsButton, [=] {
-						App::wnd()->sessionController()->showSettings(
+						controller->showSettings(
 							Settings::Type::Calls,
 							Window::SectionShow(anim::type::instant));
 					});
diff --git a/Telegram/SourceFiles/window/window_peer_menu.cpp b/Telegram/SourceFiles/window/window_peer_menu.cpp
index d33d5e05a..855b01aa4 100644
--- a/Telegram/SourceFiles/window/window_peer_menu.cpp
+++ b/Telegram/SourceFiles/window/window_peer_menu.cpp
@@ -462,7 +462,7 @@ void Filler::addUserActions(not_null<UserData*> user) {
 		if (!user->isContact() && !user->isSelf() && !user->isBot()) {
 			_addAction(
 				tr::lng_info_add_as_contact(tr::now),
-				[=] { window->show(Box(EditContactBox, window, user)); });
+				[=] { window->show(Box(EditContactBox, controller, user)); });
 		}
 		if (user->canShareThisContact()) {
 			_addAction(
@@ -472,7 +472,7 @@ void Filler::addUserActions(not_null<UserData*> user) {
 		if (user->isContact() && !user->isSelf()) {
 			_addAction(
 				tr::lng_info_edit_contact(tr::now),
-				[=] { window->show(Box(EditContactBox, window, user)); });
+				[=] { window->show(Box(EditContactBox, controller, user)); });
 			_addAction(
 				tr::lng_info_delete_contact(tr::now),
 				[=] { PeerMenuDeleteContact(user); });
diff --git a/Telegram/SourceFiles/window/window_session_controller.cpp b/Telegram/SourceFiles/window/window_session_controller.cpp
index 04a9d1e39..f32dd939c 100644
--- a/Telegram/SourceFiles/window/window_session_controller.cpp
+++ b/Telegram/SourceFiles/window/window_session_controller.cpp
@@ -23,11 +23,16 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_channel.h"
 #include "data/data_chat.h"
 #include "data/data_chat_filters.h"
+#include "data/data_photo.h" // requestAttachedStickerSets.
 #include "passport/passport_form_controller.h"
 #include "chat_helpers/tabbed_selector.h"
 #include "core/shortcuts.h"
 #include "base/unixtime.h"
 #include "boxes/calendar_box.h"
+#include "boxes/sticker_set_box.h" // requestAttachedStickerSets.
+#include "boxes/confirm_box.h" // requestAttachedStickerSets.
+#include "boxes/stickers_box.h" // requestAttachedStickerSets.
+#include "lang/lang_keys.h" // requestAttachedStickerSets.
 #include "mainwidget.h"
 #include "mainwindow.h"
 #include "main/main_session.h"
@@ -223,6 +228,36 @@ rpl::producer<> SessionController::filtersMenuChanged() const {
 	return _filtersMenuChanged.events();
 }
 
+void SessionController::requestAttachedStickerSets(
+		not_null<PhotoData*> photo) {
+	session().api().request(_attachedStickerSetsRequestId).cancel();
+	_attachedStickerSetsRequestId = session().api().request(
+		MTPmessages_GetAttachedStickers(
+			MTP_inputStickeredMediaPhoto(photo->mtpInput())
+	)).done([=](const MTPVector<MTPStickerSetCovered> &result) {
+		if (result.v.isEmpty()) {
+			Ui::show(Box<InformBox>(tr::lng_stickers_not_found(tr::now)));
+			return;
+		} else if (result.v.size() > 1) {
+			Ui::show(Box<StickersBox>(this, result));
+			return;
+		}
+		// Single attached sticker pack.
+		const auto setData = result.v.front().match([&](const auto &data) {
+			return data.vset().match([&](const MTPDstickerSet &data) {
+				return &data;
+			});
+		});
+
+		const auto setId = (setData->vid().v && setData->vaccess_hash().v)
+			? MTP_inputStickerSetID(setData->vid(), setData->vaccess_hash())
+			: MTP_inputStickerSetShortName(setData->vshort_name());
+		Ui::show(Box<StickerSetBox>(this, setId), Ui::LayerOption::KeepOther);
+	}).fail([=](const RPCError &error) {
+		Ui::show(Box<InformBox>(tr::lng_stickers_not_found(tr::now)));
+	}).send();
+}
+
 void SessionController::checkOpenedFilter() {
 	if (const auto filterId = activeChatsFilterCurrent()) {
 		const auto &list = session().data().chatsFilters().list();
@@ -800,6 +835,8 @@ void SessionController::setActiveChatsFilter(FilterId id) {
 	}
 }
 
-SessionController::~SessionController() = default;
+SessionController::~SessionController() {
+	session().api().request(_attachedStickerSetsRequestId).cancel();
+}
 
 } // namespace Window
diff --git a/Telegram/SourceFiles/window/window_session_controller.h b/Telegram/SourceFiles/window/window_session_controller.h
index 8ef98ff05..bd2544027 100644
--- a/Telegram/SourceFiles/window/window_session_controller.h
+++ b/Telegram/SourceFiles/window/window_session_controller.h
@@ -15,6 +15,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "dialogs/dialogs_key.h"
 #include "ui/effects/animation_value.h"
 
+class PhotoData;
 class MainWidget;
 class MainWindow;
 class HistoryMessage;
@@ -304,6 +305,8 @@ public:
 	void toggleFiltersMenu(bool enabled);
 	[[nodiscard]] rpl::producer<> filtersMenuChanged() const;
 
+	void requestAttachedStickerSets(not_null<PhotoData*> photo);
+
 	rpl::lifetime &lifetime() {
 		return _lifetime;
 	}
@@ -361,6 +364,8 @@ private:
 
 	rpl::event_stream<> _filtersMenuChanged;
 
+	mtpRequestId _attachedStickerSetsRequestId = 0;
+
 	rpl::lifetime _lifetime;
 
 };