diff --git a/src/common/ScriptInjector.ts b/src/common/ScriptInjector.ts
index 8ff723ae..05f87ab7 100644
--- a/src/common/ScriptInjector.ts
+++ b/src/common/ScriptInjector.ts
@@ -193,7 +193,7 @@ class _ScriptInjector {
 		params: Record<string, unknown> = {},
 		tabId: number | null = null
 	): Promise<T | null> {
-		if (!url) {
+		if (!url && Shared.manifestVersion !== 3) {
 			return null;
 		}
 
@@ -206,6 +206,8 @@ class _ScriptInjector {
 						target: { tabId },
 						func: Shared.functionsToInject[id],
 						args: [params],
+						// @ts-expect-error This is a newer value, so it's missing from the types.
+						world: 'MAIN',
 					})
 					.then((results) => {
 						const value = results[0].result as T | null;
@@ -225,6 +227,8 @@ class _ScriptInjector {
 						target: { tabId },
 						func: Shared.functionsToInject[id],
 						args: [params],
+						// @ts-expect-error This is a newer value, so it's missing from the types.
+						world: 'MAIN',
 					});
 					value = results[0].result as T | null;
 				} else {
diff --git a/src/common/ScrobbleParser.ts b/src/common/ScrobbleParser.ts
index 2db41054..8b810328 100644
--- a/src/common/ScrobbleParser.ts
+++ b/src/common/ScrobbleParser.ts
@@ -83,7 +83,7 @@ export abstract class ScrobbleParser {
 	 * Below are the methods that can be used to parse the playback. Generic methods do not need to be overridden in the child class, as they should work out-of-the-box. If one method fails, the next one is attempted, in the order listed.
 	 *
 	 *   1. **video player:** generic method, based on `videoPlayerSelector`, which can be specified through the options
-	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-playback` key in `Shared.functionsToInject` e.g. `netflix-playback`)
+	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-playback` key in `Shared.functionsToInject` at the `{serviceName}Api.ts` file e.g. `netflix-playback` at `NetflixApi.ts`)
 	 *   3. **DOM:** specific method (requires override)
 	 *   4. **custom:** specific method (requires override)
 	 */
@@ -193,7 +193,7 @@ export abstract class ScrobbleParser {
 	 * Below are the methods that can be used to parse the item. Generic methods do not need to be overridden in the child class, as they should work out-of-the-box. If one method fails, the next one is attempted, in the order listed.
 	 *
 	 *   1. **API:** generic method, but requires a non-null return from `parseItemId` and the implementation of `*Api#getItem`
-	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-item` key in `Shared.functionsToInject` e.g. `netflix-item`)
+	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-item` key in `Shared.functionsToInject` at the `{serviceName}Api.ts` file e.g. `netflix-item` at `NetflixApi.ts`)
 	 *   3. **DOM:** specific method (requires override)
 	 *   4. **custom:** specific method (requires override)
 	 */
@@ -254,7 +254,7 @@ export abstract class ScrobbleParser {
 	 * Below are the methods that can be used to parse the item ID. Generic methods do not need to be overridden in the child class, as they should work out-of-the-box. If one method fails, the next one is attempted, in the order listed.
 	 *
 	 *   1. **URL:** generic method, based on `watchingUrlRegex`, which can be specified through the options
-	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-item-id` key in `Shared.functionsToInject` e.g. `netflix-item-id`)
+	 *   2. **injected script:** specific method (requires adding a function to the `{serviceId}-item-id` key in `Shared.functionsToInject` at the `{serviceName}Api.ts` file e.g. `netflix-item-id` at `NetflixApi.ts`)
 	 *   3. **DOM:** specific method (requires override)
 	 *   4. **custom:** specific method (requires override)
 	 */
diff --git a/src/services/nrk/NrkApi.ts b/src/services/nrk/NrkApi.ts
index b5714b30..3296ea33 100644
--- a/src/services/nrk/NrkApi.ts
+++ b/src/services/nrk/NrkApi.ts
@@ -1,6 +1,7 @@
 import { NrkService } from '@/nrk/NrkService';
 import { ServiceApi } from '@apis/ServiceApi';
 import { Requests, withHeaders } from '@common/Requests';
+import { Shared } from '@common/Shared';
 import { Utils } from '@common/Utils';
 import {
 	BaseItemValues,
@@ -333,4 +334,16 @@ class _NrkApi extends ServiceApi {
 	}
 }
 
+Shared.functionsToInject[`${NrkService.id}-item-id`] = () => {
+	let itemId: string | null = null;
+	const { player } = window;
+	if (player) {
+		const playbackSession = player.getPlaybackSession();
+		if (playbackSession) {
+			itemId = playbackSession.mediaItem?.id ?? null;
+		}
+	}
+	return itemId;
+};
+
 export const NrkApi = new _NrkApi();
diff --git a/src/services/nrk/NrkParser.ts b/src/services/nrk/NrkParser.ts
index 30dd4161..dd9ba7ca 100644
--- a/src/services/nrk/NrkParser.ts
+++ b/src/services/nrk/NrkParser.ts
@@ -1,6 +1,5 @@
 import { NrkApi } from '@/nrk/NrkApi';
 import { ScrobbleParser } from '@common/ScrobbleParser';
-import { Shared } from '@common/Shared';
 
 class _NrkParser extends ScrobbleParser {
 	constructor() {
@@ -8,16 +7,4 @@ class _NrkParser extends ScrobbleParser {
 	}
 }
 
-Shared.functionsToInject[`${NrkApi.id}-item-id`] = () => {
-	let itemId: string | null = null;
-	const { player } = window;
-	if (player) {
-		const playbackSession = player.getPlaybackSession();
-		if (playbackSession) {
-			itemId = playbackSession.mediaItem?.id ?? null;
-		}
-	}
-	return itemId;
-};
-
 export const NrkParser = new _NrkParser();