diff --git a/lib/bus.ts b/lib/bus.ts
index 0c580db..e132f6a 100644
--- a/lib/bus.ts
+++ b/lib/bus.ts
@@ -8,32 +8,35 @@ import {runtime, tabs, RawPort, MessageSender} from "./browser";
 export class Port extends EventEmitter {
   private port: RawPort | null;
 
+  private disconnected = false;
+
   constructor(port: RawPort) {
     super();
     this.port = port;
 
-    let disconnected = false;
-    const disconnect = () => {
-      if (disconnected) {
-        return;
-      }
-      disconnected = true;
-      this.port = null; // Break the cycle
-      this.emit("disconnect", this, port);
-    };
     // Nasty firefox bug, thus listen for tab removal explicitly
     if (port.sender && port.sender.tab && port.sender.tab.id) {
       const otherTabId = port.sender.tab.id;
-      const tabListener = function(tabId: number) {
+      const tabListener = (tabId: number) => {
         if (tabId !== otherTabId) {
           return;
         }
-        disconnect();
+        this.disconnect();
       };
       tabs.onRemoved.addListener(tabListener);
     }
     port.onMessage.addListener(this.onMessage.bind(this));
-    port.onDisconnect.addListener(disconnect);
+    port.onDisconnect.addListener(this.disconnect.bind(this));
+  }
+
+  disconnect() {
+    if (this.disconnected) {
+      return;
+    }
+    this.disconnected = true;
+    const {port} = this;
+    this.port = null; // Break the cycle
+    this.emit("disconnect", this, port);
   }
 
   get name() {
@@ -120,6 +123,9 @@ export const Bus = new class extends EventEmitter {
       port.disconnect();
       return;
     }
-    this.ports.emit(port.name, new Port(port));
+    const wrapped = new Port(port);
+    if (!this.ports.emit(port.name, wrapped)) {
+      wrapped.disconnect();
+    }
   }
 }();
diff --git a/lib/manager/man.ts b/lib/manager/man.ts
index 6bac439..032579e 100644
--- a/lib/manager/man.ts
+++ b/lib/manager/man.ts
@@ -93,6 +93,7 @@ export class Manager extends EventEmitter {
         this.ports.delete(mport);
       });
       this.ports.add(mport);
+      return true;
     });
     Limits.on("changed", () => {
       this.resetScheduler();
diff --git a/lib/select.ts b/lib/select.ts
index 77ffba6..bfc1bc5 100644
--- a/lib/select.ts
+++ b/lib/select.ts
@@ -101,7 +101,10 @@ export async function select(links: BaseItem[], media: BaseItem[]) {
   tracker.track(window.id, null);
   try {
     const port = await Promise.race<Port>([
-      new Promise<Port>(resolve => Bus.oncePort("select", resolve)),
+      new Promise<Port>(resolve => Bus.oncePort("select", port => {
+        resolve(port);
+        return true;
+      })),
       timeout<Port>(5 * 1000)]);
     if (!port.isSelf) {
       throw Error("Invalid sender connected");
diff --git a/lib/single.ts b/lib/single.ts
index 26b2712..4488715 100644
--- a/lib/single.ts
+++ b/lib/single.ts
@@ -24,7 +24,10 @@ export async function single(item: BaseItem | null) {
   tracker.track(window.id, null);
   try {
     const port: Port = await Promise.race<Port>([
-      new Promise<Port>(resolve => Bus.oncePort("single", resolve)),
+      new Promise<Port>(resolve => Bus.oncePort("single", port => {
+        resolve(port);
+        return true;
+      })),
       timeout<Port>(5 * 1000)]);
     if (!port.isSelf) {
       throw Error("Invalid sender connected");