diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ff81a5a..9e0d6c6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,15 +20,3 @@ Compatibility reports are always helpful. Use the "Compatibility Report" issue t
 
 Either fork and edit the messages files manually or to easily add/edit localizations, use the web-ext-translator tool:
 https://lusito.github.io/web-ext-translator/?gh=https://github.com/hensm/fx_cast/
-
-Missing strings:
-
-* `de`
-    * `mediaOverlayTitle`
-    * `optionsBridgeBackupEnabled`
-    * `optionsBridgeBackupEnabledDescription`
-    * `optionsMediaOverlayEnabled`
-    * `optionsMediaOverlayEnabledDescription`
-    * `optionsMediaOverlayEnabledTemp`
-    * `popupMediaTypeAppMedia`
-    * `popupStopButtonTitle`
diff --git a/ext/src/_locales/de/messages.json b/ext/src/_locales/de/messages.json
index b6d90fc..9d553b6 100644
--- a/ext/src/_locales/de/messages.json
+++ b/ext/src/_locales/de/messages.json
@@ -13,6 +13,10 @@
         "message": "Die App dieser Seite"
       , "description": "Receiver selector media type <option> text for current site's sender application."
     }
+  , "popupMediaTypeAppMedia": {
+        "message": "Diese Medien"
+      , "description": "Receiver selector media type <option> text for media casting."
+    }
   , "popupMediaTypeTab": {
         "message": "Diesen Tab"
       , "description": "Receiver selector media type <option> text for current tab."
@@ -52,6 +56,10 @@
             }
         }
     }
+  , "popupStopButtonTitle": {
+        "message": "Stopp"
+      , "description": "Alternate action button text displayed instead of popupCastButtonTitle."
+    }
 
 
   , "contextCast": {
@@ -85,6 +93,17 @@
     }
 
 
+  , "mediaOverlayTitle": {
+        "message": "Wiedergabe auf $receiverName$"
+      , "description": "Main title for overlay displayed on media elements whilst casting."
+      , "placeholders": {
+            "receiverName": {
+                "content": "$1"
+              , "example": "Living Room TV"
+            }
+        }
+    }
+
   , "optionsBridgeLoading": {
         "message": "Lade Bridge-Informationen..."
       , "description": "Loading placeholder text for bridge section on options page."
@@ -181,6 +200,15 @@
       , "description": "Update now button title. Ellipsis indicates additional information as it triggers an update window popup."
     }
 
+  , "optionsBridgeBackupEnabled": {
+        "message": "Aktiviere Ausweich-Daemon-Verbindung"
+      , "description": "Backup daemon checkbox label."
+    }
+  , "optionsBridgeBackupEnabledDescription": {
+        "message": "Versuchen zur Bridge im Daemon-Modus zu verbinden, wenn die reguläre Bridge-Verbindung fehlschlägt."
+      , "description": "Backup daemon checkbox description."
+    }
+
   , "optionsMediaCategoryName": {
         "message": "Medien streamen"
       , "description": "Options page media casting category title."
@@ -193,6 +221,18 @@
         "message": "Streamen von Medien aktivieren"
       , "description": "Media casting enabled checkbox label."
     }
+  , "optionsMediaOverlayEnabled": {
+        "message": "Aktiviere Medien-Overlay"
+      , "description": "Media element overlay checkbox label."
+    }
+  , "optionsMediaOverlayEnabledTemp": {
+        "message": "Aktiviere Medien-Overlay (experimentell)"
+      , "description": "Experimental-labelled version of above."
+    }
+  , "optionsMediaOverlayEnabledDescription": {
+        "message": "Overlay auf Medien, das, wenn verbunden, Informationen über die aktuelle Sitzung anzeigt."
+      , "description": "Media element overlay option description."
+    }
   , "optionsMediaSyncElement": {
         "message": "Empfängerstatus mit Media-Element synchronisieren"
       , "description": "Media casting sync checkbox label."