diff --git a/app/src/main/res/values-ca/strings.xml b/app/src/main/res/values-ca/strings.xml
index d7f346730..9ff905487 100644
--- a/app/src/main/res/values-ca/strings.xml
+++ b/app/src/main/res/values-ca/strings.xml
@@ -2,8 +2,100 @@
 <resources>
 
 
+    <!-- Home Fragment -->
+    <!-- Content description (not visible, for screen readers etc.): "Three dot" menu button. -->
+    <string name="content_description_menu">Més opcions</string>
+    <!-- Content description (not visible, for screen readers etc.): "Private Browsing" menu button. -->
+    <string name="content_description_private_browsing_button">Activa la navegació privada</string>
+    <!-- Content description (not visible, for screen readers etc.): "Private Browsing" menu button. -->
+    <string name="content_description_disable_private_browsing_button">Desactiva la navegació privada</string>
+    <!-- Placeholder text shown in the search bar before a user enters text -->
+    <string name="search_hint">Escriviu una cerca o adreça</string>
+    <!-- No Open Tabs Message Header -->
+    <string name="no_open_tabs_header">No hi ha cap pestanya oberta</string>
+    <!-- No Open Tabs Message Description -->
+    <string name="no_open_tabs_description">Les pestanyes obertes es mostraran aquí.</string>
+
+    <!-- Private Browsing -->
+    <!-- Title for private session option -->
+    <string name="private_browsing_title">Esteu en una sessió privada</string>
+    <!-- Delete session button to erase your history in a private session -->
+    <string name="private_browsing_delete_session">Suprimeix la sessió</string>
+
+    <!-- Browser Fragment -->
+    <!-- Content description (not visible, for screen readers etc.): Navigate to open tabs -->
+    <string name="browser_tabs_button">Pestanyes obertes</string>
+    <!-- Content description (not visible, for screen readers etc.): Navigate backward (browsing history) -->
+    <string name="browser_menu_back">Enrere</string>
+    <!-- Content description (not visible, for screen readers etc.): Navigate forward (browsing history) -->
+    <string name="browser_menu_forward">Endavant</string>
+    <!-- Content description (not visible, for screen readers etc.): Refresh current website -->
+    <string name="browser_menu_refresh">Actualitza</string>
+    <!-- Content description (not visible, for screen readers etc.): Stop loading current website -->
+    <string name="browser_menu_stop">Atura</string>
+    <!-- Browser menu button that sends a user to help articles -->
+    <string name="browser_menu_help">Ajuda</string>
+    <!-- Browser menu button that opens the settings menu -->
+    <string name="browser_menu_settings">Paràmetres</string>
+    <!-- Browser menu button that opens a user's library -->
+    <string name="browser_menu_your_library">La vostra biblioteca</string>
+    <!-- Browser menu toggle that requests a desktop site -->
+    <string name="browser_menu_desktop_site">Lloc d’escriptori</string>
+    <!-- Browser menu button that opens the find in page menu -->
+    <string name="browser_menu_find_in_page">Cerca a la pàgina</string>
+    <!-- Browser menu button that creates a private tab -->
+    <string name="browser_menu_private_tab">Pestanya privada</string>
+    <!-- Browser menu button that creates a new tab -->
+    <string name="browser_menu_new_tab">Pestanya nova</string>
+    <!-- Browser menu button that saves the current tab to a collection -->
+    <string name="browser_menu_save_to_collection">Desa a la col·lecció</string>
+    <!-- Browser menu button that opens a dialog to report issues with the current site -->
+    <string name="browser_menu_report_issue">Informa d’un problema amb el lloc</string>
+    <!-- Browser menu button that open a share menu to share the current site -->
+    <string name="browser_menu_share">Comparteix</string>
+    <!-- Share menu title, displayed when a user is sharing their current site -->
+    <string name="menu_share_with">Comparteix amb…</string>
+    <!-- Browser menu button shown in custom tabs that opens the current tab in Fenix
+        The first parameter is the name of the app defined in app_name (for example: Fenix) -->
+    <string name="browser_menu_open_in_fenix">Obre amb el %1$s</string>
+    <!-- Browser menu text shown in custom tabs to indicate this is a Fenix tab
+        The first parameter is the name of the app defined in app_name (for example: Fenix) -->
+    <string name="browser_menu_powered_by">FUNCIONA AMB EL %1$s</string>
+
+    <!-- Search Fragment -->
+    <!-- Button in the search view that lets a user search by scanning a QR code -->
+    <string name="search_scan_button">Escaneja</string>
+    <!-- Button in the search view that lets a user search by using a shortcut -->
+    <string name="search_shortcuts_button">Dreceres</string>
+    <!-- Button in the search view when shortcuts are displayed that takes a user to the search engine settings -->
+    <string name="search_shortcuts_engine_settings">Paràmetres del motor de cerca</string>
+    <!-- Header displayed when selecting a shortcut search engine -->
+    <string name="search_shortcuts_search_with">Cerca amb</string>
+    <!-- Button in the search view that lets a user navigate to the site in their clipboard -->
+    <string name="awesomebar_clipboard_title">Utilitza l’enllaç del porta-retalls</string>
+
+    <!-- Search Widget -->
+    <!-- Text preview for smaller sized widgets -->
+    <string name="search_widget_text_short">Cerca</string>
+    <!-- Text preview for larger sized widgets -->
+    <string name="search_widget_text_long">Cerca al web</string>
+
+    <!-- Preferences -->
+    <!-- Title for the settings page-->
+    <string name="settings">Paràmetres</string>
+    <!-- Preference category for basic settings -->
+    <string name="preferences_category_basics">Bàsics</string>
+    <!-- Preference category for all links about Fenix -->
+    <string name="preferences_category_about">Quant a</string>
+    <!-- Preference for settings related to changing the default search engine -->
+    <string name="preferences_search_engine">Motor de cerca</string>
+    <!-- Preference linking to help about Fenix -->
+    <string name="preferences_help">Ajuda</string>
+
+
     <!-- Category of trackers (cryptominers) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_cryptominers_title">Miners de criptomonedes</string>
     <!-- Category of trackers (fingerprinters) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_fingerprinters_title">Generadors d’empremtes digitals</string>
+
     </resources>
diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index fc66978ca..fbffb1b7c 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -826,4 +826,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS knihovny</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 panel</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">Počet panelů: %d</string>
 </resources>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 0ae478adb..615215e17 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -15,7 +15,7 @@
     <!-- No Open Tabs Message Header -->
     <string name="no_open_tabs_header">Keine Tabs geöffnet</string>
     <!-- No Open Tabs Message Description -->
-    <string name="no_open_tabs_description">Ihre offenen Tabs werden hier angezeigt.</string>
+    <string name="no_open_tabs_description">Offene Tabs werden hier angezeigt.</string>
 
     <!-- Private Browsing -->
     <!-- Title for private session option -->
@@ -42,7 +42,7 @@
     <!-- Browser menu button that opens the settings menu -->
     <string name="browser_menu_settings">Einstellungen</string>
     <!-- Browser menu button that opens a user's library -->
-    <string name="browser_menu_your_library">Ihre Bibliothek</string>
+    <string name="browser_menu_your_library">Bibliothek</string>
     <!-- Browser menu toggle that requests a desktop site -->
     <string name="browser_menu_desktop_site">Desktop-Website</string>
     <!-- Browser menu button that opens the find in page menu -->
@@ -70,7 +70,7 @@
     <!-- Button in the search view that lets a user search by scanning a QR code -->
     <string name="search_scan_button">Scannen</string>
     <!-- Button in the search view that lets a user search by using a shortcut -->
-    <string name="search_shortcuts_button">Shortcuts</string>
+    <string name="search_shortcuts_button">Suchmaschinen</string>
     <!-- Button in the search view when shortcuts are displayed that takes a user to the search engine settings -->
     <string name="search_shortcuts_engine_settings">Suchmaschinen-Einstellungen</string>
     <!-- Header displayed when selecting a shortcut search engine -->
@@ -138,9 +138,9 @@
     <!-- Preference for data choices -->
     <string name="preferences_data_choices">Datenübermittlung</string>
     <!-- Preference for data collection -->
-    <string name="preferences_data_collection">Datensammlung</string>
+    <string name="preferences_data_collection">Datenerhebung</string>
     <!-- Preference linking to the privacy notice -->
-    <string name="preferences_privacy_link">Datenschutzerklärung</string>
+    <string name="preferences_privacy_link">Datenschutzhinweis</string>
     <!-- Preference category for developer tools -->
     <string name="developer_tools_category">Entwicklerwerkzeuge</string>
     <!-- Preference for developers -->
@@ -211,7 +211,7 @@
     <string name="preferences_tracking_protection_exceptions_turn_on_for_all">Für alle Websites aktivieren</string>
 
     <!-- Text displayed when there are no exceptions, includes a learn more link that brings users to a tracking protection SUMO page -->
-    <string name="exceptions_empty_message">Mit Ausnahmen können Sie den Tracking-Schutz für ausgewählte Websites deaktivieren. \n\nWeitere Informationen</string>
+    <string name="exceptions_empty_message">Mit Ausnahmen können Sie den Schutz vor Aktivitätenverfolgung für ausgewählte Websites deaktivieren. \n\nWeitere Informationen</string>
     <!-- Description in Quick Settings that tells user tracking protection is off globally for all sites, and links to Settings to turn it on -->
     <string name="preferences_tracking_protection_turned_off_globally">Global ausgeschaltet. Öffnen Sie die Einstellungen, um diesen einzuschalten.</string>
 
@@ -243,7 +243,7 @@
     <!-- Preference for reconnecting to FxA sync -->
     <string name="preferences_sync_sign_in_to_reconnect">Melden Sie sich an, um die Verbindung wiederherzustellen</string>
     <!-- Preference for removing FxA account -->
-    <string name="preferences_sync_remove_account">Konto löschen</string>
+    <string name="preferences_sync_remove_account">Konto entfernen</string>
 
     <!-- Pairing Feature strings -->
     <!-- Instructions on how to access pairing -->
@@ -411,9 +411,9 @@
     <!-- Screen title for adding a bookmarks folder -->
     <string name="bookmark_add_folder">Ordner hinzufügen</string>
     <!-- deprecated: Snackbar title shown after a bookmark has been created. -->
-    <string name="bookmark_created_snackbar">Lesezeichen erstellt.</string>
+    <string name="bookmark_created_snackbar">Lesezeichen erstellt</string>
     <!-- Snackbar title shown after a bookmark has been created. -->
-    <string name="bookmark_saved_snackbar">Lesezeichen gespeichert!</string>
+    <string name="bookmark_saved_snackbar">Lesezeichen gespeichert</string>
     <!-- Snackbar edit button shown after a bookmark has been created. -->
     <string name="edit_bookmark_snackbar_action">BEARBEITEN</string>
 
@@ -549,10 +549,10 @@
     <string name="create_collection_save_to_collection_tab_selected">%d Tab ausgewählt</string>
 
     <!-- Text shown in snackbar when multiple tabs have been saved in a collection -->
-    <string name="create_collection_tabs_saved">Tabs gespeichert!</string>
+    <string name="create_collection_tabs_saved">Tabs gespeichert</string>
 
     <!-- Text shown in snackbar when one tab has been saved in a collection -->
-    <string name="create_collection_tab_saved">Tab gespeichert!</string>
+    <string name="create_collection_tab_saved">Tab gespeichert</string>
 
     <!-- Content description (not visible, for screen readers etc.): button to close the collection creator -->
     <string name="create_collection_close">Schließen</string>
@@ -678,7 +678,7 @@
     <string name="delete_browsing_data_on_quit_action">Beenden</string>
 
     <!-- Dialog message to the user asking to delete browsing data. -->
-    <string name="delete_browsing_data_prompt_message">Dadurch werden alle Ihre Browserdaten gelöscht.</string>
+    <string name="delete_browsing_data_prompt_message">Dadurch werden alle Ihre Browser-Daten gelöscht.</string>
     <!-- Dialog message to the user asking to delete browsing data. -->
     <string name="delete_browsing_data_prompt_message_2">Sollen die ausgewählten Browser-Daten wirklich gelöscht werden?</string>
     <!-- Dialog message to the user asking to delete browsing data. Parameter will be replaced by app name. -->
@@ -726,7 +726,7 @@
     <string name="onboarding_tracking_protection_header">Schützen Sie sich</string>
     <!-- text for the tracking protection card description
     The first parameter is the name of the app (e.g. Firefox Preview) -->
-    <string name="onboarding_tracking_protection_description">%s blockiert Werbe-Tracker, die Sie im Internet verfolgen.
+    <string name="onboarding_tracking_protection_description">%s blockiert Werbeskripte zur Aktivitätenverfolgung, die Sie im Internet verfolgen.
     </string>
     <!-- text for the private browsing onboarding card header -->
     <string name="onboarding_private_browsing_header">Privat surfen</string>
@@ -758,9 +758,9 @@
     <string name="onboarding_theme_light_title">Helles Theme</string>
 
     <!-- Text shown in snackbar when multiple tabs have been sent to device -->
-    <string name="sync_sent_tabs_snackbar">Tabs gesendet!</string>
+    <string name="sync_sent_tabs_snackbar">Tabs gesendet</string>
     <!-- Text shown in snackbar when one tab has been sent to device  -->
-    <string name="sync_sent_tab_snackbar">Tab gesendet!</string>
+    <string name="sync_sent_tab_snackbar">Tab gesendet</string>
     <!-- Title of QR Pairing Fragment -->
     <string name="sync_scan_code">Code scannen</string>
     <!-- Instructions on how to access pairing -->
@@ -784,11 +784,11 @@
     <!-- Link displayed in enhanced tracking protection panel to access tracking protection settings -->
     <string name="etp_settings">Schutzeinstellungen</string>
     <!-- Preference title for enhanced tracking protection settings -->
-    <string name="preference_enhanced_tracking_protection">Verbesserter Tracking-Schutz</string>
+    <string name="preference_enhanced_tracking_protection">Verbesserter Schutz vor Aktivitätenverfolgung</string>
     <!-- Title for the description of enhanced tracking protection -->
     <string name="preference_enhanced_tracking_protection_explanation_title">Surfen Sie, ohne verfolgt zu werden</string>
     <!-- Description of enhanced tracking protection. The first parameter is the name of the application (For example: Fenix) -->
-    <string name="preference_enhanced_tracking_protection_explanation">Behalten Sie Ihre Daten für sich. %s schützt Sie vor vielen der gängigsten Tracker, die Ihre Online-Aktivitäten verfolgen.</string>
+    <string name="preference_enhanced_tracking_protection_explanation">Behalten Sie Ihre Daten für sich. %s schützt Sie vor vielen der gängigsten Skripte, die Ihre Online-Aktivitäten verfolgen.</string>
     <!-- Text displayed that links to website about enhanced tracking protection -->
     <string name="preference_enhanced_tracking_protection_explanation_learn_more">Weitere Informationen</string>
     <!-- Preference for enhanced tracking protection for the standard protection settings -->
@@ -810,7 +810,7 @@
     <!-- Category of trackers (cross-site tracking cookies) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_cookies_title">Seitenübergreifende Tracking-Cookies</string>
     <!-- Description of cross-site tracking cookies that can be blocked by Enhanced Tracking Protection -->
-    <string name="etp_cookies_description">Blockiert Cookies, die von Werbenetzwerken und Analyseunternehmen verwendet werden, um Ihre Browserdaten auf vielen Websites zusammenzustellen.</string>
+    <string name="etp_cookies_description">Blockiert Cookies, die von Werbenetzwerken und Analyseunternehmen verwendet werden, um Ihre Browser-Daten auf vielen Websites zusammenzustellen.</string>
     <!-- Category of trackers (cryptominers) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_cryptominers_title">Heimliche Digitalwährungsberechner (Krypto-Miner)</string>
     <!-- Description of cryptominers that can be blocked by Enhanced Tracking Protection -->
@@ -818,17 +818,17 @@
     <!-- Category of trackers (fingerprinters) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_fingerprinters_title">Identifizierer (Fingerprinter)</string>
     <!-- Description of fingerprinters that can be blocked by Enhanced Tracking Protection -->
-    <string name="etp_fingerprinters_description">Verhindert, dass eindeutig identifizierbare Daten über Ihr Gerät erfasst werden, die für Tracking-Zwecke verwendet werden können.</string>
+    <string name="etp_fingerprinters_description">Verhindert, dass eindeutig identifizierbare Daten über Ihr Gerät erfasst werden, die zur Aktivitätenverfolgung verwendet werden können.</string>
     <!-- Category of trackers (tracking content) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_tracking_content_title">Tracking-Inhalt</string>
     <!-- Description of tracking content that can be blocked by Enhanced Tracking Protection -->
-    <string name="etp_tracking_content_description">Verhindert das Laden von Werbung, Videos und anderem Content, der Tracking-Code enthält. Kann einige Funktionen der Website beeinträchtigen.</string>
+    <string name="etp_tracking_content_description">Verhindert das Laden von Werbung, Videos und anderen Inhalten, die Skripte zur Aktivitätenverfolgung enthalten. Kann einige Funktionen der Website beeinträchtigen.</string>
     <!-- Enhanced Tracking Protection Onboarding Message shown in a dialog above the toolbar. The first parameter is the name of the application (For example: Fenix) -->
-    <string name="etp_onboarding_message">Wenn der Schild die Farbe ändert, blockiert %s die Tracker auf einer Website. Tippen Sie darauf, um zu sehen, was blockiert wird.</string>
+    <string name="etp_onboarding_message">Wenn der Schild die Farbe ändert, blockiert %s die Skripte zur Aktivitätenverfolgung auf einer Website. Tippen Sie darauf, um zu sehen, was blockiert wird.</string>
     <!-- Enhanced Tracking Protection message that protection is currently on for this site -->
-    <string name="etp_panel_on">Der Schutz für diese Site ist aktiviert</string>
+    <string name="etp_panel_on">Der Schutz für diese Website ist aktiviert</string>
     <!-- Enhanced Tracking Protection message that protection is currently off for this site -->
-    <string name="etp_panel_off">Der Schutz für diese Site ist deaktiviert</string>
+    <string name="etp_panel_off">Der Schutz für diese Website ist deaktiviert</string>
     <!-- Header for exceptions list for which sites enhanced tracking protection is always off -->
     <string name="enhanced_tracking_protection_exceptions">Verbesserter Schutz vor Aktivitätenverfolgung ist für diese Websites deaktiviert</string>
     <!-- About page Your rights link text -->
@@ -838,4 +838,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS-Bibliotheken</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 Tab</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d Tabs</string>
 </resources>
diff --git a/app/src/main/res/values-es-rAR/strings.xml b/app/src/main/res/values-es-rAR/strings.xml
index 2b8fce8f3..37ad6da0b 100644
--- a/app/src/main/res/values-es-rAR/strings.xml
+++ b/app/src/main/res/values-es-rAR/strings.xml
@@ -199,9 +199,9 @@
 
     <!-- Advanced Preferences -->
     <!-- Preference for tracking protection settings -->
-    <string name="preferences_tracking_protection_settings">Protección de rastreo</string>
+    <string name="preferences_tracking_protection_settings">Protección contra rastreo</string>
     <!-- Preference switch for tracking protection -->
-    <string name="preferences_tracking_protection">Protección de rastreo</string>
+    <string name="preferences_tracking_protection">Protección contra rastreo</string>
     <!-- Preference switch description for tracking protection -->
     <string name="preferences_tracking_protection_description">Bloquear contenido y scripts que te rastrean en línea</string>
     <!-- Preference for tracking protection exceptions -->
@@ -213,7 +213,7 @@
 
 
     <!-- Text displayed when there are no exceptions, includes a learn more link that brings users to a tracking protection SUMO page -->
-    <string name="exceptions_empty_message">Las excepciones te permiten deshabilitar la protección de rastreo para los sitios seleccionados. \n\nConocer más</string>
+    <string name="exceptions_empty_message">Las excepciones te permiten deshabilitar la protección contra rastreo para los sitios seleccionados. \n\nConocer más</string>
     <!-- Description in Quick Settings that tells user tracking protection is off globally for all sites, and links to Settings to turn it on -->
     <string name="preferences_tracking_protection_turned_off_globally">Deshabilitado globalmente, ir a Ajustes para habilitarlo.</string>
 
@@ -777,7 +777,7 @@
     <!-- Link displayed in enhanced tracking protection panel to access tracking protection settings -->
     <string name="etp_settings">Ajustes de protección</string>
     <!-- Preference title for enhanced tracking protection settings -->
-    <string name="preference_enhanced_tracking_protection">Protección de rastreo mejorada</string>
+    <string name="preference_enhanced_tracking_protection">Protección contra rastreo aumentada</string>
     <!-- Title for the description of enhanced tracking protection -->
     <string name="preference_enhanced_tracking_protection_explanation_title">Navegá sin que te sigan</string>
     <!-- Description of enhanced tracking protection. The first parameter is the name of the application (For example: Fenix) -->
@@ -823,7 +823,7 @@
     <!-- Enhanced Tracking Protection message that protection is currently off for this site -->
     <string name="etp_panel_off">Las protecciones están OFF para este sitio</string>
     <!-- Header for exceptions list for which sites enhanced tracking protection is always off -->
-    <string name="enhanced_tracking_protection_exceptions">La protección contra rastreo mejorada está deshabilitada para estos sitios</string>
+    <string name="enhanced_tracking_protection_exceptions">La protección contra rastreo aumentada está deshabilitada para estos sitios</string>
     <!-- About page Your rights link text -->
     <string name="about_your_rights">Tus derechos</string>
     <!-- About page link text to open open source licenses screen -->
@@ -831,4 +831,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Bibliotecas OSS</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 pestaña</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d pestañas</string>
 </resources>
diff --git a/app/src/main/res/values-eu/strings.xml b/app/src/main/res/values-eu/strings.xml
index 1bd80ec71..b9779bdca 100644
--- a/app/src/main/res/values-eu/strings.xml
+++ b/app/src/main/res/values-eu/strings.xml
@@ -219,6 +219,10 @@
     <string name="preference_usage_data">Erabilera eta datu teknikoak</string>
     <!-- Preference description for usage and technical data collection -->
     <string name="preferences_usage_data_description">Nabigatzailearen errendimenduaren, erabilpenaren, hardwarearen eta pertsonalizazioen inguruko datuak partekatzen ditu Mozillarekin %1$s hobetzen laguntzeko</string>
+    <!-- Title for experiments preferences -->
+    <string name="preference_experiments">Esperimentuak</string>
+    <!-- Summary for experiments preferences -->
+    <string name="preference_experiments_summary">Baimendu Mozillari datuak instalatu eta jasotzea eginbide esperimentalak garatzeko</string>
     <!-- Preference switch for crash reporter -->
     <string name="preferences_crash_reporter">Hutsegiteen berriemailea</string>
 
@@ -578,6 +582,8 @@
     <string name="snackbar_tab_deleted">Fitxa ezabatuta</string>
     <!-- Text shown in snackbar when user deletes all tabs -->
     <string name="snackbar_tabs_deleted">Fitxak ezabatuta</string>
+    <!-- Text shown in snackbar when user deletes all private tabs -->
+    <string name="snackbar_private_tabs_deleted">Fitxa pribatuak ezabatuta</string>
     <!-- Text for action to undo deleting a tab or collection shown in snackbar -->
     <string name="snackbar_deleted_undo">DESEGIN</string>
     <!-- QR code scanner prompt which appears after scanning a code, but before navigating to it
@@ -621,16 +627,42 @@
     <!-- Subtitle for the data and history items in delete browsing data, parameter will be replaced with the
         number of history items the user has -->
     <string name="preferences_delete_browsing_data_browsing_data_subtitle">%d helbide</string>
+    <!-- Title for history items in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_browsing_history_title">Historia</string>
+    <!-- Subtitle for the history items in delete browsing data, parameter will be replaced with the
+        number of history pages the user has -->
+    <string name="preferences_delete_browsing_data_browsing_history_subtitle">%d orri</string>
     <!-- Title for the collections item in Delete browsing data -->
     <string name="preferences_delete_browsing_data_collections_title">Bildumak</string>
     <!-- Subtitle for the collections item in Delete browsing data, parameter will be replaced with the
         number of collections that will be deleted -->
     <string name="preferences_delete_browsing_data_collections_subtitle">%d bilduma</string>
+    <!-- Title for the cookies item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cookies">Cookieak</string>
+    <!-- Subtitle for the cookies item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cookies_subtitle">Webgune gehienetan saioa amaituko duzu</string>
+    <!-- Title for the cached images and files item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cached_files">Cachean gordetako argazki eta fitxategiak</string>
+    <!-- Subtitle for the cached images and files item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cached_files_subtitle">Biltegiratze tokia libratzen du</string>
+    <!-- Title for the site permissions item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_site_permissions">Gunearen baimenak</string>
     <!-- Text for the button to delete browsing data -->
     <string name="preferences_delete_browsing_data_button">Ezabatu nabigatze-datuak</string>
 
+    <!-- Title for the Delete browsing data on quit preference -->
+    <string name="preferences_delete_browsing_data_on_quit">Ezabatu nabigatze-datuak irteterakoan</string>
+    <!-- Summary for the Delete browsing data on quit preference. "Quit" translation should match delete_browsing_data_on_quit_action translation. -->
+    <string name="preference_summary_delete_browsing_data_on_quit">Nabigatze-datuak automatikoki ezabatzen ditu menu nagusian &quot;Irten&quot; hautatzerakoan</string>
+    <!-- Action item in menu for the Delete browsing data on quit feature -->
+    <string name="delete_browsing_data_on_quit_action">Irten</string>
+
     <!-- Dialog message to the user asking to delete browsing data. -->
     <string name="delete_browsing_data_prompt_message">Zure nabigatze-datu guztiak ezabatuko ditu honek.</string>
+    <!-- Dialog message to the user asking to delete browsing data. -->
+    <string name="delete_browsing_data_prompt_message_2">Ziur zaude hautatutako nabigazio-datuak ezabatu nahi dituzula?</string>
+    <!-- Dialog message to the user asking to delete browsing data. Parameter will be replaced by app name. -->
+    <string name="delete_browsing_data_prompt_message_3">%s(e)k hautatutako nabigazio datuak ezabatuko ditu.</string>
     <!-- Text for the cancel button for the data deletion dialog -->
     <string name="delete_browsing_data_prompt_cancel">Utzi</string>
     <!-- Text for the allow button for the data deletion dialog -->
@@ -749,9 +781,9 @@
     <!-- Preference description for enhanced tracking protection for the strict protection settings -->
     <string name="preference_enhanced_tracking_protection_strict_description">Babes sendoagoa baina zenbait gune edo eduki apurtzea eragin lezake.</string>
     <!-- Header for categories that are being blocked by current Enhanced Tracking Protection settings -->
-    <string name="enhanced_tracking_protection_blocking">Blokeatzen</string>
+    <string name="enhanced_tracking_protection_blocked">Blokeatuta</string>
     <!-- Header for categories that are being not being blocked by current Enhanced Tracking Protection settings -->
-    <string name="enhanced_tracking_protection_not_blocking">Ez blokeatzen</string>
+    <string name="enhanced_tracking_protection_allowed">Baimenduta</string>
     <!-- Category of trackers (social media trackers) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_social_media_trackers_title">Sare sozialetako jarraipen-elementuak</string>
     <!-- Description of social media trackers that can be blocked by Enhanced Tracking Protection -->
@@ -787,4 +819,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Kode irekiko liburutegiak</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">Fitxa bat</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d fitxa</string>
 </resources>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 7d0137217..d54dad0d4 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -775,10 +775,6 @@
     <string name="preference_enhanced_tracking_protection_strict">Strict</string>
     <!-- Preference description for enhanced tracking protection for the strict protection settings -->
     <string name="preference_enhanced_tracking_protection_strict_description">Protection renforcée, mais certains sites ou contenus peuvent être endommagés.</string>
-    <!-- Header for categories that are being blocked by current Enhanced Tracking Protection settings -->
-    <string name="enhanced_tracking_protection_blocking">Bloqués</string>
-    <!-- Header for categories that are being not being blocked by current Enhanced Tracking Protection settings -->
-    <string name="enhanced_tracking_protection_not_blocking">Non bloqués</string>
     <!-- Category of trackers (social media trackers) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_social_media_trackers_title">Traqueurs de réseaux sociaux</string>
     <!-- Description of social media trackers that can be blocked by Enhanced Tracking Protection -->
@@ -814,4 +810,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Bibliothèques open source</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 onglet</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d onglets</string>
 </resources>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index de8cd33fd..ef28f0c95 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -841,4 +841,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Librerie OSS</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 scheda</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d schede</string>
 </resources>
diff --git a/app/src/main/res/values-nl/strings.xml b/app/src/main/res/values-nl/strings.xml
index 8d32ed69c..2e4536912 100644
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@@ -819,4 +819,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS-bibliotheken</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 tabblad</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d tabbladen</string>
 </resources>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index 535c5a537..d0f79cb88 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -815,4 +815,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Biblioteki open source</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">Karty: 1</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">Karty: %d</string>
 </resources>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 7ef0fa1f2..e7face60f 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -841,4 +841,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | Свободные библиотеки</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 вкладка</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d вкладки(ок)</string>
 </resources>
diff --git a/app/src/main/res/values-sk/strings.xml b/app/src/main/res/values-sk/strings.xml
index 429faf2e6..e71823bbc 100644
--- a/app/src/main/res/values-sk/strings.xml
+++ b/app/src/main/res/values-sk/strings.xml
@@ -80,6 +80,12 @@
     <!-- Button in the search view that lets a user navigate to the site in their clipboard -->
     <string name="awesomebar_clipboard_title">Prilepiť odkaz zo schránky</string>
 
+    <!-- Search Widget -->
+    <!-- Text preview for smaller sized widgets -->
+    <string name="search_widget_text_short">Hľadať</string>
+    <!-- Text preview for larger sized widgets -->
+    <string name="search_widget_text_long">Hľadať na webe</string>
+
     <!-- Preferences -->
     <!-- Title for the settings page-->
     <string name="settings">Nastavenia</string>
@@ -216,6 +222,10 @@
     <string name="preference_usage_data">Údaje o používaní a technické údaje</string>
     <!-- Preference description for usage and technical data collection -->
     <string name="preferences_usage_data_description">Zdieľa údaje o výkonnosti, využívaní funkcií, hardvérovej konfigurácii a prispôsobení prehliadača s Mozillou s cieľom urobiť %1$s lepším</string>
+    <!-- Title for experiments preferences -->
+    <string name="preference_experiments">Experimenty</string>
+    <!-- Summary for experiments preferences -->
+    <string name="preference_experiments_summary">Umožňuje Mozille inštalovať a zbierať údaje o experimentálnych funkciách</string>
     <!-- Preference switch for crash reporter -->
     <string name="preferences_crash_reporter">Hlásenie pádov</string>
     <!-- Preference switch for Mozilla location service -->
@@ -362,6 +372,12 @@
         is a digit showing the number of items you have selected -->
     <string name="history_delete_some">Počet položiek na odstránenie: %1$d</string>
 
+    <!-- Text for the header that groups the history for last 24 hours -->
+    <string name="history_24_hours">Posledných 24 hodín</string>
+    <!-- Text for the header that groups the history the past 7 days -->
+    <string name="history_7_days">Posledných 7 dní</string>
+    <!-- Text for the header that groups the history the past 30 days -->
+    <string name="history_30_days">Posledných 30 dní</string>
     <!-- Text for the header that groups the history older than the last month -->
     <string name="history_older">Staršia</string>
     <!-- Text shown when no history exists -->
@@ -489,6 +505,9 @@
     <!-- Summary of tracking protection preference if tracking protection is set to off -->
     <string name="tracking_protection_off">Vypnutá</string>
 
+    <!-- Collections -->
+    <!-- Label to describe what collections are to a new user without any collections -->
+    <string name="collections_description">Ukladajte si stránky a karty, na ktorých vám záleží, do kolekcií.</string>
     <!-- Collections header on home fragment -->
     <string name="collections_header">Kolekcie</string>
     <!-- Content description (not visible, for screen readers etc.): Opens the collection menu when pressed -->
@@ -564,6 +583,8 @@
     <string name="snackbar_tab_deleted">Karta bola odstránená</string>
     <!-- Text shown in snackbar when user deletes all tabs -->
     <string name="snackbar_tabs_deleted">Karty boli odstránené</string>
+    <!-- Text shown in snackbar when user deletes all private tabs -->
+    <string name="snackbar_private_tabs_deleted">Súkromné karty boli odstránené</string>
     <!-- Text for action to undo deleting a tab or collection shown in snackbar -->
     <string name="snackbar_deleted_undo">SPÄŤ</string>
     <!-- QR code scanner prompt which appears after scanning a code, but before navigating to it
@@ -607,16 +628,42 @@
     <!-- Subtitle for the data and history items in delete browsing data, parameter will be replaced with the
         number of history items the user has -->
     <string name="preferences_delete_browsing_data_browsing_data_subtitle">Počet adries: %d</string>
+    <!-- Title for history items in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_browsing_history_title">História</string>
+    <!-- Subtitle for the history items in delete browsing data, parameter will be replaced with the
+        number of history pages the user has -->
+    <string name="preferences_delete_browsing_data_browsing_history_subtitle">Počet stránok:</string>
     <!-- Title for the collections item in Delete browsing data -->
     <string name="preferences_delete_browsing_data_collections_title">Kolekcie</string>
     <!-- Subtitle for the collections item in Delete browsing data, parameter will be replaced with the
         number of collections that will be deleted -->
     <string name="preferences_delete_browsing_data_collections_subtitle">Počet kolekcií: %d</string>
+    <!-- Title for the cookies item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cookies">Cookies</string>
+    <!-- Subtitle for the cookies item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cookies_subtitle">Príde k vášmu odhláseniu z väčšiny webových stránok</string>
+    <!-- Title for the cached images and files item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cached_files">Obrázky a súbory v medzipamäti</string>
+    <!-- Subtitle for the cached images and files item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_cached_files_subtitle">Uvolní priestor v zariadení</string>
+    <!-- Title for the site permissions item in Delete browsing data -->
+    <string name="preferences_delete_browsing_data_site_permissions">Povolenia stránok</string>
     <!-- Text for the button to delete browsing data -->
     <string name="preferences_delete_browsing_data_button">Odstrániť údaje o prehliadaní</string>
 
+    <!-- Title for the Delete browsing data on quit preference -->
+    <string name="preferences_delete_browsing_data_on_quit">Odstrániť údaje o prehliadaní pri ukončení aplikácie</string>
+    <!-- Summary for the Delete browsing data on quit preference. "Quit" translation should match delete_browsing_data_on_quit_action translation. -->
+    <string name="preference_summary_delete_browsing_data_on_quit">Automaticky odstráni údaje o prehliadaní po stlačení tlačidla „Ukončiť“ v hlavnej ponuke</string>
+    <!-- Action item in menu for the Delete browsing data on quit feature -->
+    <string name="delete_browsing_data_on_quit_action">Ukončiť</string>
+
     <!-- Dialog message to the user asking to delete browsing data. -->
     <string name="delete_browsing_data_prompt_message">Vaše údaje o prehliadaní budú odstránené.</string>
+    <!-- Dialog message to the user asking to delete browsing data. -->
+    <string name="delete_browsing_data_prompt_message_2">Naozaj chcete odstrániť tieto údaje o prehliadaní?</string>
+    <!-- Dialog message to the user asking to delete browsing data. Parameter will be replaced by app name. -->
+    <string name="delete_browsing_data_prompt_message_3">%s odstráni vybrané údaje.</string>
     <!-- Text for the cancel button for the data deletion dialog -->
     <string name="delete_browsing_data_prompt_cancel">Zrušiť</string>
     <!-- Text for the allow button for the data deletion dialog -->
@@ -720,8 +767,18 @@
     <string name="etp_settings">Nastavenia ochrany</string>
     <!-- Preference title for enhanced tracking protection settings -->
     <string name="preference_enhanced_tracking_protection">Rozšírená ochrana pred sledovaním</string>
+    <!-- Title for the description of enhanced tracking protection -->
+    <string name="preference_enhanced_tracking_protection_explanation_title">Nenechajte sa pri prehliadaní sledovať</string>
+    <!-- Description of enhanced tracking protection. The first parameter is the name of the application (For example: Fenix) -->
+    <string name="preference_enhanced_tracking_protection_explanation">%s vás chráni pred mnohými sledovacími prvkami, ktoré zbierajú informácie o tom, čo robíte na internete.</string>
     <!-- Text displayed that links to website about enhanced tracking protection -->
     <string name="preference_enhanced_tracking_protection_explanation_learn_more">Ďalšie informácie</string>
+    <!-- Preference description for enhanced tracking protection for the standard protection settings -->
+    <string name="preference_enhanced_tracking_protection_standard_description">Vyvážená ochrana a výkon.</string>
+    <!-- Preference description for enhanced tracking protection for the strict protection settings -->
+    <string name="preference_enhanced_tracking_protection_strict_description">Viac blokovaného obsahu zvyšuje pravdepodobnosť, že niektoré stránky nebudú správne fungovať.</string>
+    <!-- Category of trackers (fingerprinters) that can be blocked by Enhanced Tracking Protection -->
+    <string name="etp_fingerprinters_title">Odtlačok prehliadača</string>
     <!-- About page Your rights link text -->
     <string name="about_your_rights">Vaše práva</string>
     <!-- About page link text to open open source licenses screen -->
@@ -729,4 +786,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS knižnice</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 karta</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">Počet kariet: %d</string>
 </resources>
diff --git a/app/src/main/res/values-sv-rSE/strings.xml b/app/src/main/res/values-sv-rSE/strings.xml
index 4dc56875e..786816c35 100644
--- a/app/src/main/res/values-sv-rSE/strings.xml
+++ b/app/src/main/res/values-sv-rSE/strings.xml
@@ -824,4 +824,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS bibliotek</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 flik</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d flikar</string>
 </resources>
diff --git a/app/src/main/res/values-tr/strings.xml b/app/src/main/res/values-tr/strings.xml
index 8154abd9d..1d4b1765b 100644
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@@ -214,6 +214,8 @@
     <string name="preferences_usage_data_description">%1$s tarayıcınızı iyileştirmemize yardımcı olmak için tarayıcınızla ilgili performans, kullanım, donanım ve özelleştirme verilerini Mozilla ile paylaşır</string>
     <!-- Title for experiments preferences -->
     <string name="preference_experiments">Deneyler</string>
+    <!-- Summary for experiments preferences -->
+    <string name="preference_experiments_summary">Mozilla\'nın deneysel özellikler için veri yüklemesine ve toplamasına izin verir</string>
     <!-- Preference switch for crash reporter -->
     <string name="preferences_crash_reporter">Çökme habercisi</string>
     <!-- Preference switch for Mozilla location service -->
@@ -771,12 +773,18 @@
     <string name="etp_social_media_trackers_title">Sosyal medya takipçileri</string>
     <!-- Category of trackers (cross-site tracking cookies) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_cookies_title">Siteler arası takip çerezleri</string>
+    <!-- Description of cross-site tracking cookies that can be blocked by Enhanced Tracking Protection -->
+    <string name="etp_cookies_description">Reklam ağlarının ve analitik şirketlerinin farklı siteler arasındaki gezintilerinizi izlemek için kullandığı çerezleri engeller.</string>
     <!-- Category of trackers (cryptominers) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_cryptominers_title">Kripto madencileri</string>
+    <!-- Description of cryptominers that can be blocked by Enhanced Tracking Protection -->
+    <string name="etp_cryptominers_description">Kötü amaçlı betiklerin kripto para üretmek amacıyla cihazınıza erişmesini önler.</string>
     <!-- Category of trackers (fingerprinters) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_fingerprinters_title">Parmak izi toplayıcılar</string>
     <!-- Category of trackers (tracking content) that can be blocked by Enhanced Tracking Protection -->
     <string name="etp_tracking_content_title">Takip amaçlı içerikler</string>
+    <!-- Description of tracking content that can be blocked by Enhanced Tracking Protection -->
+    <string name="etp_tracking_content_description">Takip kodu içeren reklamların, videoların ve diğer içeriklerin yüklenmesini engeller. Bazı sitelerin işlevlerini etkileyebilir.</string>
     <!-- Enhanced Tracking Protection Onboarding Message shown in a dialog above the toolbar. The first parameter is the name of the application (For example: Fenix) -->
     <string name="etp_onboarding_message">Kalkan renk değiştirdiğinde %s bir sitedeki takipçileri engelliyor demektir. Neyin engellendiğini görmek için kalkana dokunun.</string>
     <!-- Enhanced Tracking Protection message that protection is currently on for this site -->
@@ -792,4 +800,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | OSS Kitaplıkları</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 sekme</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d sekme</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 5eddf7db7..9c9b7c99f 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -845,4 +845,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | 开源软件库</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 个标签页</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d 个标签页</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 0ecc8b7d0..7710b3183 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -837,4 +837,9 @@
     <!-- Open source licenses page title
     The first parameter is the app name -->
     <string name="open_source_licenses_title">%s | 開放原始碼程式庫</string>
+
+    <!-- Content description of the tab counter toolbar button when one tab is open -->
+    <string name="tab_counter_content_description_one_tab">1 個分頁</string>
+    <!-- Content description of the tab counter toolbar button when multiple tabs are open. First parameter will be replaced with the number of tabs (always more than one) -->
+    <string name="tab_counter_content_description_multi_tab">%d 個分頁</string>
 </resources>