diff --git a/locales/ar/browser/browser/zen-general.ftl b/locales/ar/browser/browser/zen-general.ftl
index 268c9cab9..06d859638 100644
--- a/locales/ar/browser/browser/zen-general.ftl
+++ b/locales/ar/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/bg/browser/browser/zen-general.ftl b/locales/bg/browser/browser/zen-general.ftl
index 1cbda76df..947896d3f 100644
--- a/locales/bg/browser/browser/zen-general.ftl
+++ b/locales/bg/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/bs/browser/browser/zen-general.ftl b/locales/bs/browser/browser/zen-general.ftl
index 1cbda76df..947896d3f 100644
--- a/locales/bs/browser/browser/zen-general.ftl
+++ b/locales/bs/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/ca/browser/browser/zen-general.ftl b/locales/ca/browser/browser/zen-general.ftl
index e10a8fbb5..2edccf916 100644
--- a/locales/ca/browser/browser/zen-general.ftl
+++ b/locales/ca/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Alguna cosa no funciona?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Reinici en mode segur
+zen-window-sync-migration-dialog-title = Mantingueu les finestres sincronitzades
+zen-window-sync-migration-dialog-message = El Zen ara sincronitza les finestres del mateix dispositiu, de manera que els canvis en una finestra es reflecteixen a les altres a l'instant.
+zen-window-sync-migration-dialog-learn-more = Més informació
+zen-window-sync-migration-dialog-accept = D'acord
diff --git a/locales/cs/browser/browser/preferences/zen-preferences.ftl b/locales/cs/browser/browser/preferences/zen-preferences.ftl
index 8850d2aff..7e574aeb7 100644
--- a/locales/cs/browser/browser/preferences/zen-preferences.ftl
+++ b/locales/cs/browser/browser/preferences/zen-preferences.ftl
@@ -314,4 +314,4 @@ zen-devtools-toggle-storage-shortcut = Přepnout úložiště
 zen-devtools-toggle-dom-shortcut = Přepnout DOM
 zen-devtools-toggle-accessibility-shortcut = Přepnout přístupnost
 zen-close-all-unpinned-tabs-shortcut = Zavřít všechny nepřipnuté panely
-zen-new-unsynced-window-shortcut = New Unsynced Window
+zen-new-unsynced-window-shortcut = Nové nesynchronizované okno
diff --git a/locales/cs/browser/browser/zen-general.ftl b/locales/cs/browser/browser/zen-general.ftl
index 3b8567409..92f8602a9 100644
--- a/locales/cs/browser/browser/zen-general.ftl
+++ b/locales/cs/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Něco se rozbilo?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restartovat v Nouzovém Režimu
+zen-window-sync-migration-dialog-title = Mějte svá okna synchronizovaná
+zen-window-sync-migration-dialog-message = Zen nyní synchronizuje okna na stejném zařízení. Změny provedené v jednom okně se okamžitě projeví v ostatních.
+zen-window-sync-migration-dialog-learn-more = Zjistit více
+zen-window-sync-migration-dialog-accept = Rozumím
diff --git a/locales/cs/browser/browser/zen-menubar.ftl b/locales/cs/browser/browser/zen-menubar.ftl
index b0ec89fd8..a1fe2526a 100644
--- a/locales/cs/browser/browser/zen-menubar.ftl
+++ b/locales/cs/browser/browser/zen-menubar.ftl
@@ -9,12 +9,12 @@ zen-menubar-toggle-pinned-tabs =
            *[false] Collapse Pinned Tabs
         }
 zen-menubar-appearance = 
-    .label = Appearance
+    .label = Vzhled
 zen-menubar-appearance-description = 
-    .label = Websites will use:
+    .label = Webové stránky budou používat:
 zen-menubar-appearance-auto = 
-    .label = Automatic
+    .label = Automatický
 zen-menubar-appearance-light = 
-    .label = Light
+    .label = Světlý
 zen-menubar-appearance-dark = 
-    .label = Dark
+    .label = Tmavý
diff --git a/locales/cy/browser/browser/zen-general.ftl b/locales/cy/browser/browser/zen-general.ftl
index d8151445a..4beb86931 100644
--- a/locales/cy/browser/browser/zen-general.ftl
+++ b/locales/cy/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Rhywbeth wedi torri?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Ailgychwyn yn y Modd Diogel
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/cy/browser/browser/zen-menubar.ftl b/locales/cy/browser/browser/zen-menubar.ftl
index d39463bbf..9e8e375de 100644
--- a/locales/cy/browser/browser/zen-menubar.ftl
+++ b/locales/cy/browser/browser/zen-menubar.ftl
@@ -5,8 +5,8 @@
 zen-menubar-toggle-pinned-tabs = 
     .label =
         { $pinnedAreCollapsed ->
-        [gwir] Ehangu Tabiau wedi'u Pinio
-        *[ffug] Lleihau Tabiau wedi'u Pinio
+            [gwir] Ehangu Tabiau wedi'u Pinio
+           *[ffug] Lleihau Tabiau wedi'u Pinio
         }
 zen-menubar-appearance = 
     .label = Gwedd
diff --git a/locales/cy/browser/browser/zen-split-view.ftl b/locales/cy/browser/browser/zen-split-view.ftl
index 659d47d75..9c8bed8c7 100644
--- a/locales/cy/browser/browser/zen-split-view.ftl
+++ b/locales/cy/browser/browser/zen-split-view.ftl
@@ -5,8 +5,8 @@
 tab-zen-split-tabs = 
     .label =
         { $tabCount ->
-        [1] Tab Hollt (angen sawl tab wedi'u dewis)
-        *[other] Hollti { $tabCount } Tab
+            [1] Tab Hollt (angen sawl tab wedi'u dewis)
+           *[other] Hollti { $tabCount } Tab
         }
     .accesskey = H
 zen-split-link = 
diff --git a/locales/da/browser/browser/zen-general.ftl b/locales/da/browser/browser/zen-general.ftl
index d98bc4c88..93a60f168 100644
--- a/locales/da/browser/browser/zen-general.ftl
+++ b/locales/da/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/de/browser/browser/zen-general.ftl b/locales/de/browser/browser/zen-general.ftl
index ac4cd2fb0..fbad02ac4 100644
--- a/locales/de/browser/browser/zen-general.ftl
+++ b/locales/de/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Funktioniert etwas nicht?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Im abgesicherten Modus neu starten
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/el/browser/browser/zen-general.ftl b/locales/el/browser/browser/zen-general.ftl
index 807ba6a57..1eed8fb7c 100644
--- a/locales/el/browser/browser/zen-general.ftl
+++ b/locales/el/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Χάλασε κάτι;
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Επανεκκίνηση σε Ασφαλή Λειτουργία
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/en-GB/browser/browser/zen-general.ftl b/locales/en-GB/browser/browser/zen-general.ftl
index e8f2d55dd..1bd517e93 100644
--- a/locales/en-GB/browser/browser/zen-general.ftl
+++ b/locales/en-GB/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/es-ES/browser/browser/zen-general.ftl b/locales/es-ES/browser/browser/zen-general.ftl
index eab82c2dc..2cee7f76b 100644
--- a/locales/es-ES/browser/browser/zen-general.ftl
+++ b/locales/es-ES/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = ¿Algo dejó de funcionar?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Reiniciar en modo seguro
+zen-window-sync-migration-dialog-title = Mantenga sus ventanas sincronizadas
+zen-window-sync-migration-dialog-message = Ahora Zen sincroniza las ventanas en el mismo dispositivo, por lo que los cambios en una ventana se reflejan en las demás instantáneamente.
+zen-window-sync-migration-dialog-learn-more = Más información
+zen-window-sync-migration-dialog-accept = Entendido
diff --git a/locales/et/browser/browser/zen-general.ftl b/locales/et/browser/browser/zen-general.ftl
index 7a1556b3f..014293941 100644
--- a/locales/et/browser/browser/zen-general.ftl
+++ b/locales/et/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/fa/browser/browser/zen-general.ftl b/locales/fa/browser/browser/zen-general.ftl
index 2ed6edef7..bc48eb00a 100644
--- a/locales/fa/browser/browser/zen-general.ftl
+++ b/locales/fa/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/fi/browser/browser/zen-general.ftl b/locales/fi/browser/browser/zen-general.ftl
index 02c87cea6..e0af7cf90 100644
--- a/locales/fi/browser/browser/zen-general.ftl
+++ b/locales/fi/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Jotain rikki?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Käynnistä uudelleen vianmääritystilassa
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/fr/browser/browser/zen-general.ftl b/locales/fr/browser/browser/zen-general.ftl
index c3600c965..59a7d019f 100644
--- a/locales/fr/browser/browser/zen-general.ftl
+++ b/locales/fr/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Un problème est survenu ?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Redémarrer en mode de dépannage
+zen-window-sync-migration-dialog-title = Gardez vos fenêtres synchronisées
+zen-window-sync-migration-dialog-message = Zen synchronise désormais les fenêtres sur le même appareil, de sorte que les modifications apportées à une fenêtre sont instantanément répercutées sur les autres.
+zen-window-sync-migration-dialog-learn-more = En savoir plus
+zen-window-sync-migration-dialog-accept = J'ai compris
diff --git a/locales/ga-IE/browser/browser/zen-general.ftl b/locales/ga-IE/browser/browser/zen-general.ftl
index 256cee2bb..6e762411e 100644
--- a/locales/ga-IE/browser/browser/zen-general.ftl
+++ b/locales/ga-IE/browser/browser/zen-general.ftl
@@ -60,8 +60,8 @@ zen-site-data-settings = Socruithe
 zen-generic-manage = Bainistigh
 zen-generic-more = Tuilleadh
 zen-generic-next = Ar Aghaidh
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = Cuir leis na Bunriachtanais
+zen-essentials-promo-sublabel = Coinnigh do chluaisíní is fearr leat cliceáil amháin uait
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = Ceadaithe
 zen-site-data-setting-block = Blocáilte
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Bhris rud éigin?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Atosaigh i Mód Sábháilte
+zen-window-sync-migration-dialog-title = Coinnigh Do Windows Sioncrónaithe
+zen-window-sync-migration-dialog-message = Déanann Zen sioncrónú ar fhuinneoga ar an ngléas céanna anois, mar sin léirítear athruithe i bhfuinneog amháin sna fuinneoga eile láithreach.
+zen-window-sync-migration-dialog-learn-more = Foghlaim Tuilleadh
+zen-window-sync-migration-dialog-accept = Tuigim é
diff --git a/locales/ga-IE/browser/browser/zen-menubar.ftl b/locales/ga-IE/browser/browser/zen-menubar.ftl
index 0aceed104..d07cb1931 100644
--- a/locales/ga-IE/browser/browser/zen-menubar.ftl
+++ b/locales/ga-IE/browser/browser/zen-menubar.ftl
@@ -5,13 +5,13 @@
 zen-menubar-toggle-pinned-tabs = 
     .label =
         { $pinnedAreCollapsed ->
-        [true] Leathnaigh Cluaisíní Priontáilte
-        *[false] Laghdaigh Cluaisíní Priontáilte
+            [true] Leathnaigh Cluaisíní Priontáilte
+           *[false] Laghdaigh Cluaisíní Priontáilte
         }
 zen-menubar-appearance = 
-    .label = Appearance
+    .label = Dealramh
 zen-menubar-appearance-description = 
-    .label = Websites will use:
+    .label = Úsáidfidh suíomhanna gréasáin:
 zen-menubar-appearance-auto = 
     .label = Uathoibríoch
 zen-menubar-appearance-light = 
diff --git a/locales/he/browser/browser/zen-general.ftl b/locales/he/browser/browser/zen-general.ftl
index 4cec0d637..88c62a8a6 100644
--- a/locales/he/browser/browser/zen-general.ftl
+++ b/locales/he/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = משהו השתבש?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = הפעלה מחדש במצב בטוח
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = מידע נוסף
+zen-window-sync-migration-dialog-accept = הבנתי
diff --git a/locales/hu/browser/browser/zen-general.ftl b/locales/hu/browser/browser/zen-general.ftl
index dd57d4fca..bb35789f0 100644
--- a/locales/hu/browser/browser/zen-general.ftl
+++ b/locales/hu/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Valami elromlott?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Újraindítás biztonságos módban
+zen-window-sync-migration-dialog-title = Tartsad szinkronban az ablakaid
+zen-window-sync-migration-dialog-message = A Zen mostantól szinkronizálja az ugyanazon eszközön található ablakokat, így az egyik ablakban végzett módosítások azonnal megjelennek a többiben is.
+zen-window-sync-migration-dialog-learn-more = Tudj meg többet
+zen-window-sync-migration-dialog-accept = Értettem
diff --git a/locales/id/browser/browser/zen-general.ftl b/locales/id/browser/browser/zen-general.ftl
index 6391424ba..56b087813 100644
--- a/locales/id/browser/browser/zen-general.ftl
+++ b/locales/id/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Ada yang rusak?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Mulai Ulang dalam Mode Aman
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/is/browser/browser/zen-general.ftl b/locales/is/browser/browser/zen-general.ftl
index 7de7e1bc7..2b89268be 100644
--- a/locales/is/browser/browser/zen-general.ftl
+++ b/locales/is/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Bilaði eitthvað?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Endurræsa í öruggum ham
+zen-window-sync-migration-dialog-title = Samstilltu gluggana þína
+zen-window-sync-migration-dialog-message = Zen samstillir núna glugga á sama tæki, þannig að breytingar í einum glugga endurspeglast samstundis í hinum.
+zen-window-sync-migration-dialog-learn-more = Frekari upplýsingar
+zen-window-sync-migration-dialog-accept = Skilið
diff --git a/locales/it/browser/browser/zen-general.ftl b/locales/it/browser/browser/zen-general.ftl
index ed583ba65..217b460de 100644
--- a/locales/it/browser/browser/zen-general.ftl
+++ b/locales/it/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Si è rotto qualcosa?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Riavvia in Modalità Provvisoria
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/ja/browser/browser/zen-general.ftl b/locales/ja/browser/browser/zen-general.ftl
index 335487b3d..188495539 100644
--- a/locales/ja/browser/browser/zen-general.ftl
+++ b/locales/ja/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = 何か壊れましたか？
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = セーフモードで再起動する
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/ja/browser/browser/zen-vertical-tabs.ftl b/locales/ja/browser/browser/zen-vertical-tabs.ftl
index 634ea68b4..f41c3029b 100644
--- a/locales/ja/browser/browser/zen-vertical-tabs.ftl
+++ b/locales/ja/browser/browser/zen-vertical-tabs.ftl
@@ -27,13 +27,13 @@ sidebar-zen-create-new =
 tabbrowser-unload-tab-button = 
     .tooltiptext =
         { $tabCount ->
-        [one] タブをアンロードして切り替える
-        *[other] { $tabCount }つタブをアンロードして最初タブに切り替える
+            [one] タブをアンロードして切り替える
+           *[other] { $tabCount }つタブをアンロードして最初タブに切り替える
         }
 tabbrowser-reset-pin-button = 
     .tooltiptext =
         { $tabCount ->
-        [one] タブをリセットして固定する
-        *[other] タブをリセットして{ $tabCount }つタブを固定する
+            [one] タブをリセットして固定する
+           *[other] タブをリセットして{ $tabCount }つタブを固定する
         }
 tab-reset-pin-label = 固定したURLに戻る
diff --git a/locales/ko/browser/browser/zen-general.ftl b/locales/ko/browser/browser/zen-general.ftl
index 373b93f28..2b6f8d374 100644
--- a/locales/ko/browser/browser/zen-general.ftl
+++ b/locales/ko/browser/browser/zen-general.ftl
@@ -60,8 +60,8 @@ zen-site-data-settings = 설정
 zen-generic-manage = 관리
 zen-generic-more = 더 보기
 zen-generic-next = 다음
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = 에센셜에 추가
+zen-essentials-promo-sublabel = 가장 좋아하는 탭을 바로 열 수 있게
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = 허용됨
 zen-site-data-setting-block = 금지됨
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = 무언가 고장났나요?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = 안전 모드로 다시 시작
+zen-window-sync-migration-dialog-title = 창을 동기화 상태로 유지
+zen-window-sync-migration-dialog-message = Zen이 이제 같은 기기에서 창을 동기화합니다. 한 창에서의 변경이 다른 창에서도 즉시 적용됩니다.
+zen-window-sync-migration-dialog-learn-more = 더 알아보기
+zen-window-sync-migration-dialog-accept = 알겠습니다
diff --git a/locales/lt/browser/browser/zen-general.ftl b/locales/lt/browser/browser/zen-general.ftl
index c063a4025..f44043ac1 100644
--- a/locales/lt/browser/browser/zen-general.ftl
+++ b/locales/lt/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Kažkas sugedo?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Paleisti iš naujo saugioje režime
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/nb/browser/browser/zen-general.ftl b/locales/nb/browser/browser/zen-general.ftl
index 267da3012..374e61217 100644
--- a/locales/nb/browser/browser/zen-general.ftl
+++ b/locales/nb/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Er noe ødelagt?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Start på nytt i sikker modus
+zen-window-sync-migration-dialog-title = Hold vinduene dine synkronisert
+zen-window-sync-migration-dialog-message = Zen synkroniserer nå vinduer på samme enhet, så endringer i ett vindu blir reflekterte på tvers de andre med en gang.
+zen-window-sync-migration-dialog-learn-more = Lær mer
+zen-window-sync-migration-dialog-accept = Skjønner
diff --git a/locales/nb/browser/browser/zen-vertical-tabs.ftl b/locales/nb/browser/browser/zen-vertical-tabs.ftl
index 84999d037..ea8abf5d5 100644
--- a/locales/nb/browser/browser/zen-vertical-tabs.ftl
+++ b/locales/nb/browser/browser/zen-vertical-tabs.ftl
@@ -26,13 +26,13 @@ sidebar-zen-create-new =
     .label = Opprett ny...
 tabbrowser-unload-tab-button = 
     .tooltiptext =
-        {$tabCount ->
+        { $tabCount ->
             [one] Avlast og bytt til fane
            *[other] Avlast { $tabCount } faner og bytt til den første
         }
 tabbrowser-reset-pin-button = 
     .tooltiptext =
-        {$tabCount ->
+        { $tabCount ->
             [one] Tilbakestill og fest fane
            *[other] Tilbakestill og fest { $tabCount } faner
         }
diff --git a/locales/nl/browser/browser/zen-general.ftl b/locales/nl/browser/browser/zen-general.ftl
index 349b2aa5f..f94266572 100644
--- a/locales/nl/browser/browser/zen-general.ftl
+++ b/locales/nl/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/nn-NO/browser/browser/zen-general.ftl b/locales/nn-NO/browser/browser/zen-general.ftl
index 632e163fa..4ad0e5545 100644
--- a/locales/nn-NO/browser/browser/zen-general.ftl
+++ b/locales/nn-NO/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/pl/browser/browser/preferences/zen-preferences.ftl b/locales/pl/browser/browser/preferences/zen-preferences.ftl
index e347539cc..2dab03021 100644
--- a/locales/pl/browser/browser/preferences/zen-preferences.ftl
+++ b/locales/pl/browser/browser/preferences/zen-preferences.ftl
@@ -14,7 +14,7 @@ zen-layout-collapsed-toolbar = Zwinięty pasek narzędzi
 sync-currently-syncing-workspaces = Obszary robocze
 sync-engine-workspaces = 
     .label = Obszary robocze
-    .tooltiptext = Synchronizuj swoje projekty pomiędzy urządzeniami
+    .tooltiptext = Synchronizuj swoje obszary robocze pomiędzy urządzeniami
     .accesskey = Pr
 zen-glance-title = Szybki podgląd
 zen-glance-header = Ogólne ustawienia dla Szybkiego podglądu
@@ -314,4 +314,4 @@ zen-devtools-toggle-storage-shortcut = Włącz Pamięć
 zen-devtools-toggle-dom-shortcut = Włącz DOM
 zen-devtools-toggle-accessibility-shortcut = Włącz Dostępność
 zen-close-all-unpinned-tabs-shortcut = Zamknij wszystkie nieprzypięte karty
-zen-new-unsynced-window-shortcut = New Unsynced Window
+zen-new-unsynced-window-shortcut = Nowe niesynchronizowane okno
diff --git a/locales/pl/browser/browser/zen-general.ftl b/locales/pl/browser/browser/zen-general.ftl
index 6273376e2..09427130f 100644
--- a/locales/pl/browser/browser/zen-general.ftl
+++ b/locales/pl/browser/browser/zen-general.ftl
@@ -18,9 +18,9 @@ tab-context-zen-replace-pinned-url-with-current =
     .label = Zastąp przypięty adres URL aktualnym
     .accesskey = C
 tab-context-zen-edit-title = 
-    .label = Change Label...
+    .label = Zmień nazwę...
 tab-context-zen-edit-icon = 
-    .label = Change Icon...
+    .label = Zmień ikonę...
 zen-themes-corrupted = Twój plik modyfikacji { -brand-short-name } jest uszkodzony. Zostały one zresetowane do domyślnego stanu.
 zen-shortcuts-corrupted = Twój plik skrótów { -brand-short-name } jest popsuty. Skróty zostały zresetowane do domyślnych.
 # note: Do not translate the "<br/>" tags in the following string
@@ -60,8 +60,8 @@ zen-site-data-settings = Ustawienia
 zen-generic-manage = Zarządzaj
 zen-generic-more = Więcej
 zen-generic-next = Następne
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = Dodaj do kluczowych kart
+zen-essentials-promo-sublabel = Utrzymuj swoje ulubione karty w zasięgu myszki
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = Dozwolone
 zen-site-data-setting-block = Zablokowane
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Coś się zepsuło?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Zrestartuj w trybie bezpiecznym
+zen-window-sync-migration-dialog-title = Utrzymuj synchronizację okien
+zen-window-sync-migration-dialog-message = Zen synchronizuje okna na jednym urządzeniu, żeby zmiany w jednym oknie były natychmiast odzwierciedlone w pozostałych.
+zen-window-sync-migration-dialog-learn-more = Dowiedz się więcej
+zen-window-sync-migration-dialog-accept = Rozumiem
diff --git a/locales/pl/browser/browser/zen-menubar.ftl b/locales/pl/browser/browser/zen-menubar.ftl
index b0ec89fd8..0861f3246 100644
--- a/locales/pl/browser/browser/zen-menubar.ftl
+++ b/locales/pl/browser/browser/zen-menubar.ftl
@@ -5,16 +5,16 @@
 zen-menubar-toggle-pinned-tabs = 
     .label =
         { $pinnedAreCollapsed ->
-            [true] Expand Pinned Tabs
-           *[false] Collapse Pinned Tabs
+            [true] Pokaż przypięte karty
+           *[false] Ukryj przypięte karty
         }
 zen-menubar-appearance = 
-    .label = Appearance
+    .label = Wygląd
 zen-menubar-appearance-description = 
-    .label = Websites will use:
+    .label = Motyw stron internetowych:
 zen-menubar-appearance-auto = 
-    .label = Automatic
+    .label = Automatyczny
 zen-menubar-appearance-light = 
-    .label = Light
+    .label = Jasny
 zen-menubar-appearance-dark = 
-    .label = Dark
+    .label = Ciemny
diff --git a/locales/pl/browser/browser/zen-welcome.ftl b/locales/pl/browser/browser/zen-welcome.ftl
index 72e1e36b3..0584a695e 100644
--- a/locales/pl/browser/browser/zen-welcome.ftl
+++ b/locales/pl/browser/browser/zen-welcome.ftl
@@ -11,10 +11,10 @@ zen-welcome-import-button = Zaimportuj teraz
 zen-welcome-set-default-browser = Ustaw { -brand-short-name } jako swoją domyślną przeglądarkę
 zen-welcome-dont-set-default-browser = NIE ustawiaj { -brand-short-name } jako swoja domyślna przeglądarka
 zen-welcome-initial-essentials-title = Twoje kluczowe karty, zawsze w zasięgu
-zen-welcome-initial-essentials-description-1 = Utrzymuj swoje najważniejsze karty zawsze pod ręką, niezależnie od tego jak wiele masz ich otwartych.
-zen-welcome-initial-essentials-description-2 = Niezbędne karty są zawsze widoczne, niezależnie od bieżącego obszaru roboczego.
+zen-welcome-initial-essentials-description-1 = Utrzymuj swoje najważniejsze karty zawsze pod ręką, niezależnie od tego, jak wiele masz ich otwartych.
+zen-welcome-initial-essentials-description-2 = Kluczowe karty są zawsze widoczne, niezależnie od bieżącego obszaru roboczego.
 zen-welcome-workspace-colors-title = Twój obszar roboczy, Twoje kolory
-zen-welcome-workspace-colors-description = Spersonalizuj przeglądarkę nadając każdemu obszarowi roboczemu unikatową identyfikację kolorystyczną.
+zen-welcome-workspace-colors-description = Spersonalizuj przeglądarkę, nadając każdemu obszarowi roboczemu unikatową identyfikację kolorystyczną.
 zen-welcome-start-browsing-title =
     Wszystko gotowe?<br/>
     No to śmigamy!
diff --git a/locales/pl/browser/browser/zen-workspaces.ftl b/locales/pl/browser/browser/zen-workspaces.ftl
index a99f6200e..f2f5536a4 100644
--- a/locales/pl/browser/browser/zen-workspaces.ftl
+++ b/locales/pl/browser/browser/zen-workspaces.ftl
@@ -4,7 +4,7 @@
 
 zen-panel-ui-workspaces-text = Obszary robocze
 zen-panel-ui-spaces-label = 
-    .label = Spaces
+    .label = Obszary robocze
 zen-panel-ui-workspaces-create = 
     .label = Utwórz Przestrzeń
 zen-panel-ui-folder-create = 
@@ -33,7 +33,7 @@ zen-workspaces-panel-context-edit =
     .label = Edytuj obszar roboczy
     .accesskey = E
 zen-bookmark-edit-panel-workspace-selector = 
-    .value = Spaces
+    .value = Obszary robocze
     .accesskey = W
 zen-panel-ui-gradient-generator-algo-complementary = 
     .label = Uzupełniający
@@ -42,15 +42,15 @@ zen-panel-ui-gradient-generator-algo-splitComplementary =
 zen-panel-ui-gradient-generator-algo-analogous = 
     .label = Analogiczny
 zen-panel-ui-gradient-generator-algo-triadic = 
-    .label = Triadiczny
+    .label = Triadyczny
 zen-panel-ui-gradient-generator-algo-floating = 
     .label = Pływający
 zen-panel-ui-gradient-click-to-add = Kliknij, aby dodać kolor
 zen-workspace-creation-name = 
     .placeholder = Nazwa Przestrzeni
 zen-move-tab-to-workspace-button = 
-    .label = Move To...
-    .tooltiptext = Move all tabs in this window to a Space
+    .label = Przenieś do...
+    .tooltiptext = Przenieś wszystkie karty z tego okna to obszaru roboczego
 zen-workspaces-panel-context-reorder = 
     .label = Reorganizuj Przestrzenie
 zen-workspace-creation-profile = Profil
@@ -66,6 +66,6 @@ zen-workspaces-close-all-unpinned-tabs-title =
     .label = Wyczyść
     .tooltiptext = Zamknij wszystkie nieprzypięte karty
 zen-panel-ui-workspaces-change-forward = 
-    .label = Next Space
+    .label = Następny obszar roboczy
 zen-panel-ui-workspaces-change-back = 
-    .label = Previous Space
+    .label = Poprzedni obszar roboczy
diff --git a/locales/pt-BR/browser/browser/zen-general.ftl b/locales/pt-BR/browser/browser/zen-general.ftl
index a3ee478a4..3255cae15 100644
--- a/locales/pt-BR/browser/browser/zen-general.ftl
+++ b/locales/pt-BR/browser/browser/zen-general.ftl
@@ -2,7 +2,7 @@
 # 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/.
 
-zen-panel-ui-current-profile-text = perfil atual
+zen-panel-ui-current-profile-text = Perfil atual
 unified-extensions-description = As extensões são usadas para trazer mais recursos adicionais para o { -brand-short-name }.
 tab-context-zen-reset-pinned-tab = 
     .label = Redefinir Guia Fixada
@@ -58,8 +58,8 @@ zen-site-data-settings = Configurações
 zen-generic-manage = Gerenciar
 zen-generic-more = Mais
 zen-generic-next = Próximo
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = Adicionar aos Essenciais
+zen-essentials-promo-sublabel = Mantenha suas abas favoritas a um clique de distância
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = Permitido
 zen-site-data-setting-block = Bloqueado
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Algo quebrou?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Reiniciar no Modo Seguro
+zen-window-sync-migration-dialog-title = Mantenha Suas Janelas em Sincronia
+zen-window-sync-migration-dialog-message = Zen agora sincroniza as janelas no mesmo dispositivo, assim as mudanças feitas em uma janela são refletidas para as outras instantaneamente.
+zen-window-sync-migration-dialog-learn-more = Saiba Mais
+zen-window-sync-migration-dialog-accept = Entendi
diff --git a/locales/pt-PT/browser/browser/preferences/zen-preferences.ftl b/locales/pt-PT/browser/browser/preferences/zen-preferences.ftl
index 5a327b97b..dd38d63d6 100644
--- a/locales/pt-PT/browser/browser/preferences/zen-preferences.ftl
+++ b/locales/pt-PT/browser/browser/preferences/zen-preferences.ftl
@@ -314,4 +314,4 @@ zen-devtools-toggle-storage-shortcut = Alternar Armazenamento
 zen-devtools-toggle-dom-shortcut = Alternar DOM
 zen-devtools-toggle-accessibility-shortcut = Alternar Acessibilidade
 zen-close-all-unpinned-tabs-shortcut = Fechar Todos os Separadores Não Fixados
-zen-new-unsynced-window-shortcut = New Unsynced Window
+zen-new-unsynced-window-shortcut = Nova janela sem sincronização
diff --git a/locales/pt-PT/browser/browser/zen-general.ftl b/locales/pt-PT/browser/browser/zen-general.ftl
index b95081635..050de760e 100644
--- a/locales/pt-PT/browser/browser/zen-general.ftl
+++ b/locales/pt-PT/browser/browser/zen-general.ftl
@@ -60,8 +60,8 @@ zen-site-data-settings = Definições
 zen-generic-manage = Gerir
 zen-generic-more = Mais
 zen-generic-next = Seguinte
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = Adicionar aos Essenciais
+zen-essentials-promo-sublabel = Mantenha os seus separadores favoritos a um clique de distância
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = Permitido
 zen-site-data-setting-block = Bloqueado
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Falhou alguma coisa?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Reiniciar em Modo de Segurança
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/pt-PT/browser/browser/zen-menubar.ftl b/locales/pt-PT/browser/browser/zen-menubar.ftl
index b0ec89fd8..b7fa9f8c1 100644
--- a/locales/pt-PT/browser/browser/zen-menubar.ftl
+++ b/locales/pt-PT/browser/browser/zen-menubar.ftl
@@ -5,16 +5,16 @@
 zen-menubar-toggle-pinned-tabs = 
     .label =
         { $pinnedAreCollapsed ->
-            [true] Expand Pinned Tabs
-           *[false] Collapse Pinned Tabs
+            [true] Expandir Separadores Fixados
+           *[false] Colapsar Separadores Fixados
         }
 zen-menubar-appearance = 
-    .label = Appearance
+    .label = Aparência
 zen-menubar-appearance-description = 
-    .label = Websites will use:
+    .label = Os sites utilizarão:
 zen-menubar-appearance-auto = 
     .label = Automatic
 zen-menubar-appearance-light = 
-    .label = Light
+    .label = Claro
 zen-menubar-appearance-dark = 
-    .label = Dark
+    .label = Escuro
diff --git a/locales/pt-PT/browser/browser/zen-workspaces.ftl b/locales/pt-PT/browser/browser/zen-workspaces.ftl
index 1be9d6546..77bf90a10 100644
--- a/locales/pt-PT/browser/browser/zen-workspaces.ftl
+++ b/locales/pt-PT/browser/browser/zen-workspaces.ftl
@@ -2,9 +2,9 @@
 # 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/.
 
-zen-panel-ui-workspaces-text = Espaços de Trabalho
+zen-panel-ui-workspaces-text = Espaços
 zen-panel-ui-spaces-label = 
-    .label = Spaces
+    .label = Espaços
 zen-panel-ui-workspaces-create = 
     .label = Criar Espaço
 zen-panel-ui-folder-create = 
@@ -12,7 +12,7 @@ zen-panel-ui-folder-create =
 zen-panel-ui-new-empty-split = 
     .label = Nova Divisão
 zen-workspaces-panel-context-delete = 
-    .label = Eliminar Espaço de Trabalho
+    .label = Eliminar Espaço
     .accesskey = D
 zen-workspaces-panel-change-name = 
     .label = Alterar Nome
@@ -30,10 +30,10 @@ zen-workspaces-panel-context-open =
     .label = Abrir Espaço de Trabalho
     .accesskey = O
 zen-workspaces-panel-context-edit = 
-    .label = Editar Espaço de Trabalho
+    .label = Editar Espaço
     .accesskey = E
 zen-bookmark-edit-panel-workspace-selector = 
-    .value = Spaces
+    .value = Espaços
     .accesskey = W
 zen-panel-ui-gradient-generator-algo-complementary = 
     .label = Complementar
@@ -50,7 +50,7 @@ zen-workspace-creation-name =
     .placeholder = Nome do Espaço
 zen-move-tab-to-workspace-button = 
     .label = Move To...
-    .tooltiptext = Move all tabs in this window to a Space
+    .tooltiptext = Mover todos os separadores desta janela para um Espaço
 zen-workspaces-panel-context-reorder = 
     .label = Reordenar Espaços
 zen-workspace-creation-profile = Perfil
@@ -66,6 +66,6 @@ zen-workspaces-close-all-unpinned-tabs-title =
     .label = Limpar
     .tooltiptext = Fechar todos os separadores não fixados
 zen-panel-ui-workspaces-change-forward = 
-    .label = Next Space
+    .label = Espaço seguinte
 zen-panel-ui-workspaces-change-back = 
-    .label = Previous Space
+    .label = Espaço anterior
diff --git a/locales/ro/browser/browser/zen-general.ftl b/locales/ro/browser/browser/zen-general.ftl
index 1cbda76df..947896d3f 100644
--- a/locales/ro/browser/browser/zen-general.ftl
+++ b/locales/ro/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/ru/browser/browser/zen-general.ftl b/locales/ru/browser/browser/zen-general.ftl
index 610d67868..623ea0c51 100644
--- a/locales/ru/browser/browser/zen-general.ftl
+++ b/locales/ru/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Что-то пошло не так?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Перезапустить в безопасном режиме
+zen-window-sync-migration-dialog-title = Синхронизируйте окна
+zen-window-sync-migration-dialog-message = Теперь Zen синхронизирует окна на одном устройстве, поэтому изменения в одном окне будут мгновенно отображаться в других.
+zen-window-sync-migration-dialog-learn-more = Узнать больше
+zen-window-sync-migration-dialog-accept = Понятно
diff --git a/locales/sk/browser/browser/zen-general.ftl b/locales/sk/browser/browser/zen-general.ftl
index 1cbda76df..947896d3f 100644
--- a/locales/sk/browser/browser/zen-general.ftl
+++ b/locales/sk/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/sv-SE/browser/browser/zen-general.ftl b/locales/sv-SE/browser/browser/zen-general.ftl
index 5b59050b8..acc2fbf58 100644
--- a/locales/sv-SE/browser/browser/zen-general.ftl
+++ b/locales/sv-SE/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Har något gått sönder?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Starta om i felsäkert läge
+zen-window-sync-migration-dialog-title = Behåll dina fönster i Sync
+zen-window-sync-migration-dialog-message = Zen synkroniserar nu fönster på samma enhet, så ändringar i ett fönster återspeglas direkt i de andra.
+zen-window-sync-migration-dialog-learn-more = Läs mer
+zen-window-sync-migration-dialog-accept = Jag förstår
diff --git a/locales/th/browser/browser/preferences/zen-preferences.ftl b/locales/th/browser/browser/preferences/zen-preferences.ftl
index 83b19f290..ab32c3fba 100644
--- a/locales/th/browser/browser/preferences/zen-preferences.ftl
+++ b/locales/th/browser/browser/preferences/zen-preferences.ftl
@@ -196,7 +196,7 @@ zen-text-action-copy-shortcut = คัดลอก
 zen-text-action-copy-url-shortcut = คัดลอก URL ปัจจุบัน
 zen-text-action-copy-url-markdown-shortcut = คัดลอก URL ปัจจุบันในรูปแบบ Markdown
 zen-text-action-paste-shortcut = วาง
-zen-text-action-select-all-shortcut = เลือกทั้งหมด 
+zen-text-action-select-all-shortcut = เลือกทั้งหมด
 zen-text-action-delete-shortcut = ลบ
 zen-history-show-all-shortcut-mac = Show All History (Mac)
 zen-full-screen-shortcut = Toggle Full Screen
diff --git a/locales/th/browser/browser/zen-general.ftl b/locales/th/browser/browser/zen-general.ftl
index 4d7d79a0e..70c613f1c 100644
--- a/locales/th/browser/browser/zen-general.ftl
+++ b/locales/th/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Something broke?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Restart in Safe Mode
+zen-window-sync-migration-dialog-title = Keep Your Windows in Sync
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Learn More
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/tr/browser/browser/zen-folders.ftl b/locales/tr/browser/browser/zen-folders.ftl
index 2bb9d0d1f..2c4e00d29 100644
--- a/locales/tr/browser/browser/zen-folders.ftl
+++ b/locales/tr/browser/browser/zen-folders.ftl
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 zen-folders-search-placeholder = 
-    .placeholder = {$folder-name} Ara...
+    .placeholder = { $folder-name } Ara...
 zen-folders-panel-rename-folder = 
     .label = Klasörü Yeniden Adlandır
 zen-folders-panel-unpack-folder = 
diff --git a/locales/tr/browser/browser/zen-general.ftl b/locales/tr/browser/browser/zen-general.ftl
index cc5168143..9c1196a18 100644
--- a/locales/tr/browser/browser/zen-general.ftl
+++ b/locales/tr/browser/browser/zen-general.ftl
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Bir sorun mu oluştu?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Güvenli Modda Yeniden Başlat
+zen-window-sync-migration-dialog-title = Pencerelerinizi senkronize tutun
+zen-window-sync-migration-dialog-message = Zen artık aynı cihazdaki pencereleri senkronize ediyor; böylece bir pencerede yapılan değişiklikler anında diğer pencerelere yansıyor.
+zen-window-sync-migration-dialog-learn-more = Daha fazla bilgi
+zen-window-sync-migration-dialog-accept = Anladım
diff --git a/locales/uk/browser/browser/zen-general.ftl b/locales/uk/browser/browser/zen-general.ftl
index db927959c..702566c1b 100644
--- a/locales/uk/browser/browser/zen-general.ftl
+++ b/locales/uk/browser/browser/zen-general.ftl
@@ -60,8 +60,8 @@ zen-site-data-settings = Налаштування
 zen-generic-manage = Керувати
 zen-generic-more = Більше
 zen-generic-next = Далі
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = Додати до необхідного
+zen-essentials-promo-sublabel = Тримайте ваші улюблені вкладки на відстані одного клацу
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = Дозволено
 zen-site-data-setting-block = Заблоковано
@@ -109,3 +109,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Щось зламалося?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Перезапустити в безпечному режимі
+zen-window-sync-migration-dialog-title = Тримати ваші вікна синхронізованими
+zen-window-sync-migration-dialog-message = Zen тепер синхронізує вікна на одному пристрої, тому зміни в одному вікні миттєво показуватимуться в інших.
+zen-window-sync-migration-dialog-learn-more = Дізнатися більше
+zen-window-sync-migration-dialog-accept = Зрозуміло
diff --git a/locales/vi/browser/browser/zen-general.ftl b/locales/vi/browser/browser/zen-general.ftl
index b9130164e..92724a6db 100644
--- a/locales/vi/browser/browser/zen-general.ftl
+++ b/locales/vi/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = Có lỗi xảy ra?
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = Khởi động lại ở Chế độ an toàn
+zen-window-sync-migration-dialog-title = Giữ cho các cửa sổ của bạn luôn được đồng bộ
+zen-window-sync-migration-dialog-message = Zen now syncs windows on the same device, so changes in one window are reflected across the others instantly.
+zen-window-sync-migration-dialog-learn-more = Tìm hiểu thêm
+zen-window-sync-migration-dialog-accept = Got It
diff --git a/locales/zh-CN/browser/browser/zen-general.ftl b/locales/zh-CN/browser/browser/zen-general.ftl
index b8c3cf812..09eae4d28 100644
--- a/locales/zh-CN/browser/browser/zen-general.ftl
+++ b/locales/zh-CN/browser/browser/zen-general.ftl
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = 出了什么问题吗？
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = 在排障模式下重启
+zen-window-sync-migration-dialog-title = 保持您的窗口同步
+zen-window-sync-migration-dialog-message = Zen 现已支持同一设备上的窗口同步，一个窗口的更改将即时同步到其他窗口。
+zen-window-sync-migration-dialog-learn-more = 了解更多
+zen-window-sync-migration-dialog-accept = 知道了
diff --git a/locales/zh-TW/browser/browser/zen-general.ftl b/locales/zh-TW/browser/browser/zen-general.ftl
index 348f6ba6d..e5942338d 100644
--- a/locales/zh-TW/browser/browser/zen-general.ftl
+++ b/locales/zh-TW/browser/browser/zen-general.ftl
@@ -58,8 +58,8 @@ zen-site-data-settings = 設定
 zen-generic-manage = 管理
 zen-generic-more = 更多
 zen-generic-next = 下一個
-zen-essentials-promo-label = Add to Essentials
-zen-essentials-promo-sublabel = Keep your favorite tabs just a click away
+zen-essentials-promo-label = 新增至 Essentials
+zen-essentials-promo-sublabel = 僅需點擊一下就能切換至您的最愛分頁
 # These labels will be used for the site data panel settings
 zen-site-data-setting-allow = 允許
 zen-site-data-setting-block = 已封鎖
@@ -107,3 +107,7 @@ zen-sidebar-notification-updated-tooltip =
 zen-sidebar-notification-restart-safe-mode-label = 有東西壞掉了嗎？
 zen-sidebar-notification-restart-safe-mode-tooltip =
     .title = 在安全模式下重新啟動
+zen-window-sync-migration-dialog-title = 讓您的視窗處於同步狀態
+zen-window-sync-migration-dialog-message = Zen現在能同步同一裝置上的各個視窗，因而在某一視窗上的改變也會立即在其它視窗上反映出來。
+zen-window-sync-migration-dialog-learn-more = 了解更多
+zen-window-sync-migration-dialog-accept = 明白了