diff --git a/fluxer_desktop/src/preload/GscordCompatibility.ts b/fluxer_desktop/src/preload/GscordCompatibility.ts
new file mode 100644
index 0000000..9085d5a
--- /dev/null
+++ b/fluxer_desktop/src/preload/GscordCompatibility.ts
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+// These functions are serialized by executeInMainWorld: keep them self-contained.
+export function installForceAllIceTransportPolicy(): void {
+	const NativeRTCPeerConnection = window.RTCPeerConnection;
+
+	if (typeof NativeRTCPeerConnection !== 'function') {
+		return;
+	}
+
+	const nativeSetConfiguration = NativeRTCPeerConnection.prototype.setConfiguration;
+	NativeRTCPeerConnection.prototype.setConfiguration = function (configuration: RTCConfiguration): void {
+		const next = configuration?.iceTransportPolicy === 'relay'
+			? {...configuration, iceTransportPolicy: 'all' as RTCIceTransportPolicy}
+			: configuration;
+		return nativeSetConfiguration.call(this, next);
+	};
+
+	window.RTCPeerConnection = new Proxy(NativeRTCPeerConnection, {
+		construct(Target, args, newTarget) {
+			const config = args[0] as RTCConfiguration | undefined;
+
+			if (config?.iceTransportPolicy === 'relay') {
+				args[0] = {
+					...config,
+					iceTransportPolicy: 'all',
+				};
+			}
+
+			return Reflect.construct(Target, args, newTarget);
+		},
+	});
+
+	console.info('[Fluxer Desktop] WebRTC iceTransportPolicy forced to all');
+}
+
+export function installDisableLiveKitOfferWithJoin(): void {
+	const NativeWebSocket = window.WebSocket;
+	const compressionDescriptor = Object.getOwnPropertyDescriptor(
+		window,
+		'CompressionStream',
+	);
+
+	let compressionSuppressed = false;
+
+	const suppressCompressionStream = (): void => {
+		if (compressionSuppressed) {
+			return;
+		}
+
+		Object.defineProperty(window, 'CompressionStream', {
+			configurable: true,
+			writable: true,
+			value: undefined,
+		});
+
+		compressionSuppressed = true;
+	};
+
+	const restoreCompressionStream = (): void => {
+		if (!compressionSuppressed) {
+			return;
+		}
+
+		if (compressionDescriptor) {
+			Object.defineProperty(
+				window,
+				'CompressionStream',
+				compressionDescriptor,
+			);
+		} else {
+			delete (window as typeof window & {
+				CompressionStream?: typeof CompressionStream;
+			}).CompressionStream;
+		}
+
+		compressionSuppressed = false;
+	};
+
+	const isLiveKitRtcSocket = (value: string | URL): boolean => {
+		try {
+			const url = new URL(String(value), window.location.href);
+			return /\/rtc\/v1\/?$/.test(url.pathname);
+		} catch {
+			return false;
+		}
+	};
+
+	window.WebSocket = new Proxy(NativeWebSocket, {
+		construct(Target, args) {
+			const isLiveKitRtc = isLiveKitRtcSocket(
+				args[0] as string | URL,
+			);
+
+			if (isLiveKitRtc) {
+				restoreCompressionStream();
+			}
+
+			let socket: WebSocket;
+
+			try {
+				socket = Reflect.construct(Target, args, Target);
+			} catch (error) {
+				if (isLiveKitRtc) {
+					suppressCompressionStream();
+				}
+				throw error;
+			}
+
+			if (isLiveKitRtc) {
+				socket.addEventListener(
+					'close',
+					() => suppressCompressionStream(),
+					{once: true},
+				);
+			}
+
+			return socket;
+		},
+	}) as typeof WebSocket;
+
+	suppressCompressionStream();
+
+	console.info(
+		'[Fluxer Desktop] LiveKit publisher offer-with-join disabled',
+	);
+}
diff --git a/fluxer_desktop/src/preload/index.ts b/fluxer_desktop/src/preload/index.ts
index 07ef677..12d4913 100644
--- a/fluxer_desktop/src/preload/index.ts
+++ b/fluxer_desktop/src/preload/index.ts
@@ -59,6 +59,7 @@ import type {
 } from '@electron/common/Types';
 import {createBrowserHandoffPreloadAPI} from '@electron/preload/BrowserHandoffPreload';
 import {createDesktopStoragePreloadAPI} from '@electron/preload/DesktopStoragePreload';
+import {installDisableLiveKitOfferWithJoin, installForceAllIceTransportPolicy} from '@electron/preload/GscordCompatibility';
 import {createFirstContentPaintSignal} from '@electron/preload/FirstContentPaint';
 import {applyLegacyRawLocalStorage} from '@electron/preload/LegacyRawStorageSeed';
 import {createLocalAppPreloadAPI} from '@electron/preload/LocalAppPreload';
@@ -86,6 +87,9 @@ import type {
 } from '@simplewebauthn/browser';
 import {contextBridge, ipcRenderer, webFrame} from 'electron';
 
+contextBridge.executeInMainWorld({func: installForceAllIceTransportPolicy});
+contextBridge.executeInMainWorld({func: installDisableLiveKitOfferWithJoin});
+
 const ACCESSIBILITY_STORE_STORAGE_KEY = 'AccessibilityStore';
 const ACTIVE_ALLOW_TRANSPARENCY_RENDERER_ARG = '--fluxer-active-allow-transparency=1';
 const ACTIVE_USE_NATIVE_TITLEBAR_RENDERER_ARG = '--fluxer-active-use-native-titlebar=1';