diff --git a/src/command.ts b/src/command.ts
index 56bf5099966..01721f21334 100644
--- a/src/command.ts
+++ b/src/command.ts
@@ -516,7 +516,7 @@ export function validateProjectId(project: string): void {
   if (PROJECT_ID_REGEX.test(project)) {
     return;
   }
-  trackGA4("error", {
+  void trackGA4("error", {
     error_type: "Error (User)",
     details: "Invalid project ID",
   });
diff --git a/src/commands/hosting-channel-open.ts b/src/commands/hosting-channel-open.ts
index 6ae379ab43f..1a7699f7e1b 100644
--- a/src/commands/hosting-channel-open.ts
+++ b/src/commands/hosting-channel-open.ts
@@ -3,7 +3,8 @@ import { bold } from "colorette";
 import * as open from "open";
 
 import { Command } from "../command";
-import { FirebaseError } from "../error";
+import { FirebaseError, getErrMsg } from "../error";
+import { logger } from "../logger";
 import { getChannel, listChannels, normalizeName } from "../hosting/api";
 import { requirePermissions } from "../requirePermissions";
 import { needProjectId } from "../projectUtils";
@@ -55,7 +56,9 @@ export const command = new Command("hosting:channel:open [channelId]")
 
       logLabeledBullet("hosting:channel", channel.url);
       if (!options.nonInteractive) {
-        open(channel.url);
+        open(channel.url).catch((err: unknown) => {
+          logger.debug(`Unable to open URL: ${getErrMsg(err)}`);
+        });
       }
 
       return { url: channel.url };
diff --git a/src/commands/open.ts b/src/commands/open.ts
index ceaa0d34a25..0a8ed194a25 100644
--- a/src/commands/open.ts
+++ b/src/commands/open.ts
@@ -1,7 +1,7 @@
 import * as clc from "colorette";
 import * as open from "open";
 
-import { FirebaseError } from "../error";
+import { FirebaseError, getErrMsg } from "../error";
 import * as api from "../api";
 import { Command } from "../command";
 import { logger } from "../logger";
@@ -114,5 +114,7 @@ export const command = new Command("open [link]")
     logger.info(`Opening ${clc.bold(link.name)} link in your default browser:`);
     logger.info(clc.bold(clc.underline(url)));
 
-    open(url);
+    open(url).catch((err: unknown) => {
+      logger.debug(`Unable to open URL: ${getErrMsg(err)}`);
+    });
   });
diff --git a/src/gcp/cloudbilling.ts b/src/gcp/cloudbilling.ts
index 156a1a04752..f3658f3031a 100644
--- a/src/gcp/cloudbilling.ts
+++ b/src/gcp/cloudbilling.ts
@@ -148,7 +148,7 @@ async function openBillingAccount(
 ): Promise<boolean> {
   if (open) {
     try {
-      opn(url);
+      await opn(url);
     } catch (err: any) {
       logger.debug("Unable to open billing URL: " + err.stack);
     }
diff --git a/src/throttler/throttler.ts b/src/throttler/throttler.ts
index 9943240b20a..3a21a5a2a40 100644
--- a/src/throttler/throttler.ts
+++ b/src/throttler/throttler.ts
@@ -144,7 +144,8 @@ export abstract class Throttler<T, R> {
     }
 
     this.active++;
-    this.handle(this.nextWaitingTaskIndex());
+    // handle() records task success and failure itself and is intentionally not awaited (process() is sync and drives concurrency).
+    void this.handle(this.nextWaitingTaskIndex());
   }
 
   async handle(cursorIndex: number): Promise<void> {