diff --git a/ext/src/_locales/nl/messages.json b/ext/src/_locales/nl/messages.json
index 861a4cc..fb5ea1f 100755
--- a/ext/src/_locales/nl/messages.json
+++ b/ext/src/_locales/nl/messages.json
@@ -1,170 +1,366 @@
 {
+    "extensionName": {
+        "message": "EXTENSION_NAME",
+        "description": "Name of the extension and the native receiver selector window title."
+    },
     "extensionDescription": {
-        "message": ""
-    }
-
-  , "popupCastButtonTitle": {
-        "message": "Casten"
-    }
-  , "popupCastingButtonTitle": {
-        "message": "Aan het casten"
-    }
-
-  , "contextCast": {
-        "message": "Bezig met casten..."
-    }
-
-
-  , "optionsBridgeLoading": {
-        "message": "Bezig met laden van bridge-informatie..."
-    }
-  , "optionsBridgeFoundStatusTitle": {
-        "message": "Bridge aangetroffen"
-    }
-  , "optionsBridgeIssueStatusTitle": {
-        "message": "Bridge-probleem"
-    }
-  , "optionsBridgeNotFoundStatusTitle": {
-        "message": "Geen bridge aangetroffen"
-    }
-  , "optionsBridgeNotFoundStatusText": {
-        "message": "Probeer de nieuwste versie te installeren."
-    }
-  , "optionsBridgeStatsName": {
-        "message": "Naam:"
-    }
-  , "optionsBridgeStatsVersion": {
-        "message": "Versie:"
-    }
-  , "optionsBridgeStatsExpectedVersion": {
-        "message": "Verwachte versie:"
-    }
-  , "optionsBridgeStatsCompatibility": {
-        "message": "compatibiliteit:"
-    }
-  , "optionsBridgeStatsRecommendedAction": {
-        "message": "Aanbevolen actie:"
-    }
-  , "optionsBridgeCompatible": {
-        "message": "COMPATIBEL"
-    }
-  , "optionsBridgeLikelyCompatible": {
-        "message": "WAARSCHIJNLIJK COMPATIBEL"
-    }
-  , "optionsBridgeIncompatible": {
-        "message": "INCOMPATIBEL"
-    }
-  , "optionsBridgeOlderAction": {
-        "message": "De bridge-versie is ouder dan verwacht. Installeer de nieuwste bridge-versie."
-    }
-  , "optionsBridgeNewerAction": {
-        "message": "De bridge-versie is nieuwer dan verwacht. Installeer de nieuwste versie van de extensie."
-    }
-  , "optionsBridgeNoAction": {
-        "message": "Geen actie benodigd."
-    }
-  , "optionsBridgeUpdateCheck": {
-        "message": "Controleren op updates"
-    }
-  , "optionsBridgeUpdateChecking": {
-        "message": "Bezig met controleren$1"
-    }
-  , "optionsBridgeUpdateStatusNoUpdates": {
-        "message": "Geen updates beschikbaar"
-   }
-  , "optionsBridgeUpdateStatusError": {
-        "message": "Kan niet controleren op updates"
-   }
-  , "optionsBridgeUpdateAvailable": {
-        "message": "Er is een update beschikbaar:"
-   }
-  , "optionsBridgeUpdate": {
-        "message": "Nu bijwerken..."
-    }
-
-  , "optionsMediaCategoryName": {
-        "message": "Mediacasten"
-    }
-  , "optionsMediaCategoryDescription": {
-        "message": "HTML5-video/audio casten."
-    }
-  , "optionsMediaEnabled": {
-        "message": "Mediacasten ingeschakeld"
-    }
-  , "optionsMediaSyncElement": {
-        "message": "Ontvangerstatus synchroniseren met media-element"
-    }
-  , "optionsMediaStopOnUnload": {
-        "message": "Afspelen stoppen na sluiten van pagina"
-    }
-
-  , "optionsLocalMediaCategoryName": {
-        "message": "Lokale media casten"
-    }
-  , "optionsLocalMediaCategoryDescription": {
-        "message": "HTTP-server gestart door de bridge-app om lokale mediabestanden te streamen naar de ontvanger."
-    }
-  , "optionsLocalMediaEnabled": {
-        "message": "Lokaal mediacasten ingeschakeld"
-    }
-  , "optionsLocalMediaServerPort": {
-        "message": "HTTP-serverpoort:"
-    }
-
-  , "optionsUserAgentWhitelistCategoryName": {
-        "message": "Gebruikersagent - Witte lijst"
-    }
-  , "optionsUserAgentWhitelistCategoryDescription": {
-        "message": "Websites waarvan de gebruikersagent omwille van compatibiliteit moet worden ingesteld op Chrome. De patronen moeten geldig zijn."
-    }
-  , "optionsUserAgentWhitelistEnabled": {
-        "message": "Witte lijst ingeschakeld"
-    }
-  , "optionsUserAgentWhitelistContent": {
-        "message": "Patronen (gescheiden door een nieuwe regel):"
-    }
-  , "optionsUserAgentWhitelistBasicView": {
-        "message": "Basisweergave"
-    }
-  , "optionsUserAgentWhitelistRawView": {
-        "message": "Onbewerkte weergave"
-    }
-  , "optionsUserAgentWhitelistSaveRaw": {
-        "message": "Onbewerkte weergave opslaan"
-    }
-  , "optionsUserAgentWhitelistAddItem": {
-        "message": "Item toevoegen"
-    }
-  , "optionsUserAgentWhitelistEditItem": {
-        "message": "Bewerken"
-    }
-  , "optionsUserAgentWhitelistRemoveItem": {
-        "message": "Verwijderen"
-    }
-  , "optionsUserAgentWhitelistInvalidMatchPattern": {
-        "message": "Ongeldig patroon $1"
-    }
-
-  , "optionsMirroringCategoryName": {
-        "message": "Beeldschermspiegeling"
-    }
-  , "optionsMirroringCategoryDescription": {
-        "message": "Beeldscherm-/tabbladspiegeling naar een Chromecast-ontvanger."
-    }
-  , "optionsMirroringEnabled": {
-        "message": "Beeldschermspiegeling ingeschakeld"
-    }
-  , "optionsMirroringAppId": {
-        "message": "ID van ontvanger:"
-    }
-
-  , "optionsReset": {
-        "message": "Standaardwaarden herstellen"
-    }
-  , "optionsSave": {
-        "message": "Opslaan"
-    }
-  , "optionsSaved": {
-        "message": "Opgeslagen!"
+        "message": "",
+        "description": "Description of the extension shown in the add-ons manager."
+    },
+    "popupMediaTypeApp": {
+        "message": "Deze site zijn app",
+        "description": "Receiver selector media type <option> text for current site's sender application."
+    },
+    "popupMediaTypeAppMedia": {
+        "message": "Deze media",
+        "description": "Receiver selector media type <option> text for media casting."
+    },
+    "popupMediaTypeTab": {
+        "message": "Tab",
+        "description": "Receiver selector media type <option> text for current tab."
+    },
+    "popupMediaTypeScreen": {
+        "message": "Scherm",
+        "description": "Receiver selector media type <option> text for screen."
+    },
+    "popupMediaTypeFile": {
+        "message": "Bladeren...",
+        "description": "Receiver selector media type <option> text for opening a file selector dialog."
+    },
+    "popupMediaSelectCastLabel": {
+        "message": "Cast",
+        "description": "(Cast) <select> to:"
+    },
+    "popupMediaSelectToLabel": {
+        "message": "to:",
+        "description": "Cast <select> (to:)"
+    },
+    "popupNoReceiversFound": {
+        "message": "Geen ontvangende apparaten gevonden",
+        "description": "Message displayed in the receiver selector if there are no available receivers."
+    },
+    "popupCastButtonTitle": {
+        "message": "Casten",
+        "description": "Button text for each receiver entry in the receiver selector."
+    },
+    "popupCastingButtonTitle": {
+        "message": "Aan het casten$ellipsis$",
+        "description": "Button text while establishing a session in the receiver selector. Ellipsis cycles (. → .. → ...) as loading indicator.",
+        "placeholders": {
+            "ellipsis": {
+                "content": "$1",
+                "example": "..."
+            }
+        }
+    },
+    "popupStopButtonTitle": {
+        "message": "Stop",
+        "description": "Alternate action button text displayed instead of popupCastButtonTitle."
+    },
+    "contextCast": {
+        "message": "Bezig met casten...",
+        "description": "Main context menu item title. Ellipsis indicates additional information required as it triggers opening of receiver selector."
+    },
+    "contextAddToWhitelist": {
+        "message": "Voeg aan whitelist toe",
+        "description": "Top-level whitelist context menu item title."
+    },
+    "contextAddToWhitelistRecommended": {
+        "message": "Voeg $matchPattern$ toe (Aangeraden)",
+        "description": "Context menu item title for recomended match pattern.",
+        "placeholders": {
+            "matchPattern": {
+                "content": "$1",
+                "example": "https://example.com/*"
+            }
+        }
+    },
+    "contextAddToWhitelistAdvancedAdd": {
+        "message": "Voeg $matchPattern$ toe",
+        "description": "Context menu item title for all other match patterns.",
+        "placeholders": {
+            "matchPattern": {
+                "content": "$1",
+                "example": "*://*.example.com/*"
+            }
+        }
+    },
+    "mediaOverlayTitle": {
+        "message": "Speelt af op $receiverName$",
+        "description": "Main title for overlay displayed on media elements whilst casting.",
+        "placeholders": {
+            "receiverName": {
+                "content": "$1",
+                "example": "Living Room TV"
+            }
+        }
+    },
+    "optionsBridgeLoading": {
+        "message": "Bezig met laden van bridge-informatie...",
+        "description": "Loading placeholder text for bridge section on options page."
+    },
+    "optionsBridgeFoundStatusTitle": {
+        "message": "Bridge aangetroffen",
+        "description": "Bridge OK status title text."
+    },
+    "optionsBridgeIssueStatusTitle": {
+        "message": "Probleem met bridge",
+        "description": "Bridge error status title text."
+    },
+    "optionsBridgeNotFoundStatusTitle": {
+        "message": "Geen bridge aangetroffen",
+        "description": "Bridge missing status title text."
+    },
+    "optionsBridgeNotFoundStatusText": {
+        "message": "Probeer de nieuwste versie te installeren.",
+        "description": "Bridge not found additional description text"
+    },
+    "optionsBridgeStatsName": {
+        "message": "Naam:",
+        "description": "Bridge stats name row title."
+    },
+    "optionsBridgeStatsVersion": {
+        "message": "Versie:",
+        "description": "Bridge stats version row title."
+    },
+    "optionsBridgeStatsExpectedVersion": {
+        "message": "Verwachte versie:",
+        "description": "Bridge stats expected version row title."
+    },
+    "optionsBridgeStatsCompatibility": {
+        "message": "Compatibiliteit:",
+        "description": "Bridge stats compatibility row title."
+    },
+    "optionsBridgeStatsRecommendedAction": {
+        "message": "Aanbevolen actie:",
+        "description": "Bridge stats recommended action row title."
+    },
+    "optionsBridgeCompatible": {
+        "message": "COMPATIBEL",
+        "description": "Compatibility status is definitely compatible."
+    },
+    "optionsBridgeLikelyCompatible": {
+        "message": "WAARSCHIJNLIJK COMPATIBEL",
+        "description": "Compatibility status is probably compatible."
+    },
+    "optionsBridgeIncompatible": {
+        "message": "INCOMPATIBEL",
+        "description": "Compatibility status is definitely incompatible."
+    },
+    "optionsBridgeOlderAction": {
+        "message": "De bridge-versie is ouder dan verwacht. Installeer de nieuwste bridge-versie.",
+        "description": "Recommended action for when the installed bridge version is older than the installed extension version."
+    },
+    "optionsBridgeNewerAction": {
+        "message": "De bridge-versie is nieuwer dan verwacht. Installeer de nieuwste versie van de extensie.",
+        "description": "Recommended action for when the installed bridge version is newer than the installed extension version."
+    },
+    "optionsBridgeNoAction": {
+        "message": "Geen actie benodigd.",
+        "description": "Recommended action for when both bridge and extension versions are compatible or likely compatible."
+    },
+    "optionsBridgeUpdateCheck": {
+        "message": "Controleer op updates",
+        "description": "Update check button title."
+    },
+    "optionsBridgeUpdateChecking": {
+        "message": "Bezig met controleren op updates$ellipsis$",
+        "description": "Update check button title while in progress. Ellipsis cycles (. → .. → ...) as loading indicator.",
+        "placeholders": {
+            "ellipsis": {
+                "content": "$1",
+                "example": ".."
+            }
+        }
+    },
+    "optionsBridgeUpdateStatusNoUpdates": {
+        "message": "Geen updates beschikbaar",
+        "description": "Update status if no updates are found."
+    },
+    "optionsBridgeUpdateStatusError": {
+        "message": "Er is een fout opgetreden tijdens het controleren op updates",
+        "description": "Update status if an error was encountered checking for updates."
+    },
+    "optionsBridgeUpdateAvailable": {
+        "message": "Er is een update beschikbaar:",
+        "description": "Update status if an update was found."
+    },
+    "optionsBridgeUpdate": {
+        "message": "Nu bijwerken...",
+        "description": "Update now button title. Ellipsis indicates additional information as it triggers an update window popup."
+    },
+    "optionsBridgeBackupEnabled": {
+        "message": "Inschakelen van backup daemon verbinding",
+        "description": "Backup daemon checkbox label."
+    },
+    "optionsBridgeBackupEnabledDescription": {
+        "message": "Als de brigde verbinding regelmatig verbreekt, probeer dan de bridge in daemon mode te starten.",
+        "description": "Backup daemon checkbox description."
+    },
+    "optionsMediaCategoryName": {
+        "message": "Mediacasten",
+        "description": "Options page media casting category title."
+    },
+    "optionsMediaCategoryDescription": {
+        "message": "HTML5 video/audio media casten.",
+        "description": "Options page media casting category description."
+    },
+    "optionsMediaEnabled": {
+        "message": "Mediacasten ingeschakeld",
+        "description": "Media casting enabled checkbox label."
+    },
+    "optionsMediaOverlayEnabled": {
+        "message": "Inschakelen overlay media element",
+        "description": "Media element overlay checkbox label."
+    },
+    "optionsMediaOverlayEnabledTemp": {
+        "message": "Inschakelen overlay media element (Experimenteel)",
+        "description": "Experimental-labelled version of above."
+    },
+    "optionsMediaOverlayEnabledDescription": {
+        "message": "Een overlay over media elementen die informatie weergeeft over de huidige sessie indien verbonden.",
+        "description": "Media element overlay option description."
+    },
+    "optionsMediaSyncElement": {
+        "message": "Ontvangerstatus synchroniseren met media-element",
+        "description": "Media casting sync checkbox label."
+    },
+    "optionsMediaSyncElementDescription": {
+        "message": "Synchroniseer status (afspelen, volume, ondertiteling, etc...) tussen het media element en de ontvanger.",
+        "description": "Media casting sync option description."
+    },
+    "optionsMediaStopOnUnload": {
+        "message": "Afspelen stoppen na sluiten van pagina",
+        "description": "Media stop on unload checkbox label."
+    },
+    "optionsLocalMediaCategoryName": {
+        "message": "Lokale media casten",
+        "description": "Options page local media category title."
+    },
+    "optionsLocalMediaCategoryDescription": {
+        "message": "HTTP-server gestart door de bridge-app om lokale mediabestanden te streamen naar de ontvanger.",
+        "description": "Options page local media category description."
+    },
+    "optionsLocalMediaEnabled": {
+        "message": "Lokaal mediacasten ingeschakeld",
+        "description": "Local media enabled checkbox label."
+    },
+    "optionsLocalMediaServerPort": {
+        "message": "HTTP-serverpoort:",
+        "description": "HTTP server port input label."
+    },
+    "optionsReceiverSelectorCategoryName": {
+        "message": "Ontvanger selectie",
+        "description": "Options page receiver selector category title."
+    },
+    "optionsReceiverSelectorCategoryDescription": {
+        "message": "Ontvangstapparaat selectie interface",
+        "description": "Options page receiver selector category description."
+    },
+    "optionsReceiverSelectorType": {
+        "message": "Type:",
+        "description": "Receiver selector type option label."
+    },
+    "optionsReceiverSelectorTypeBrowser": {
+        "message": "Browser",
+        "description": "Receiver selector type browser radio option label."
+    },
+    "optionsReceiverSelectorTypeNative": {
+        "message": "Ingebouwd",
+        "description": "Receiver selector type native radio option label."
+    },
+    "optionsReceiverSelectorWaitForConnection": {
+        "message": "Wachten op verbinding",
+        "description": "Receiver selector wait for connection option checkbox label."
+    },
+    "optionsReceiverSelectorWaitForConnectionDescription": {
+        "message": "Hou de ontvanger selectie open totdat er verbinding is gemaakt of het maken van de verbinding mislukt.",
+        "description": "Receiver selector wait for connection option description."
+    },
+    "optionsReceiverSelectorCloseIfFocusLost": {
+        "message": "Sluit na het verliezen van de focus",
+        "description": "Receiver selector close if focus lost option checkbox label."
+    },
+    "optionsUserAgentWhitelistCategoryName": {
+        "message": "Gebruikersagent - Whitelist",
+        "description": "Options page whitelist category title."
+    },
+    "optionsUserAgentWhitelistCategoryDescription": {
+        "message": "Websites waarvan de gebruikersagent omwille van compatibiliteit moet worden ingesteld op Chrome. De patronen moeten geldig zijn.",
+        "description": "Options page whitelist category description."
+    },
+    "optionsUserAgentWhitelistEnabled": {
+        "message": "Whitelist ingeschakeld",
+        "description": "Whitelist enabled checkbox label."
+    },
+    "optionsUserAgentWhitelistContent": {
+        "message": "Patronen (gescheiden door een nieuwe regel):",
+        "description": "Match patterns editor widget label."
+    },
+    "optionsUserAgentWhitelistBasicView": {
+        "message": "Basisweergave",
+        "description": "Switch to basic view button title."
+    },
+    "optionsUserAgentWhitelistRawView": {
+        "message": "Ruwe weergave",
+        "description": "Switch to raw view button title."
+    },
+    "optionsUserAgentWhitelistSaveRaw": {
+        "message": "Ruwe weergave opslaan",
+        "description": "Save raw view edits button title."
+    },
+    "optionsUserAgentWhitelistAddItem": {
+        "message": "Voeg toe",
+        "description": "Add new whitelist item button title."
+    },
+    "optionsUserAgentWhitelistEditItem": {
+        "message": "Bewerken",
+        "description": "Edit whitelist item button title. Displayed on each item."
+    },
+    "optionsUserAgentWhitelistRemoveItem": {
+        "message": "Verwijderen",
+        "description": "Remove whitelist item button title. Displayed on each item."
+    },
+    "optionsUserAgentWhitelistInvalidMatchPattern": {
+        "message": "Ongeldig patroon $matchPattern$",
+        "description": "Error displayed by input indicating an invalid match pattern.",
+        "placeholders": {
+            "matchPattern": {
+                "content": "$1",
+                "example": "http://example"
+            }
+        }
+    },
+    "optionsMirroringCategoryName": {
+        "message": "Beeldschermspiegeling",
+        "description": "Options page mirroring category name."
+    },
+    "optionsMirroringCategoryDescription": {
+        "message": "Beeldscherm-/tabbladspiegeling naar een Chromecast-ontvanger.",
+        "description": "Options page mirroring category description."
+    },
+    "optionsMirroringEnabled": {
+        "message": "Beeldschermspiegeling ingeschakeld",
+        "description": "Mirroring enabled checkbox label."
+    },
+    "optionsMirroringAppId": {
+        "message": "App ID van ontvanger:",
+        "description": "Mirroring app ID input label."
+    },
+    "optionsMirroringAppIdDescription": {
+        "message": "App ID for a registered Chromecast receiver application. Advanced use only. Must be compatible with the default app (see GitHub repo).",
+        "description": "Mirroring app ID option description."
+    },
+    "optionsReset": {
+        "message": "Standaardwaarden herstellen",
+        "description": "Restore default options button label."
+    },
+    "optionsSave": {
+        "message": "Opslaan",
+        "description": "Save options button label."
+    },
+    "optionsSaved": {
+        "message": "Opgeslagen!",
+        "description": "Status text displayed by save button once options have been successfully saved."
     }
 }