From 256814a411dd14fe5ff442505ec9eb73c1dbff3d Mon Sep 17 00:00:00 2001
From: DellaBitta <drsanta@google.com>
Date: Tue, 25 Jun 2024 10:11:12 -0400
Subject: [PATCH 1/2] Guard _finalizationRegistry based on availability.

---
 packages/app/src/firebaseServerApp.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/packages/app/src/firebaseServerApp.ts b/packages/app/src/firebaseServerApp.ts
index 6b6c33d316b..8f0b703e187 100644
--- a/packages/app/src/firebaseServerApp.ts
+++ b/packages/app/src/firebaseServerApp.ts
@@ -32,7 +32,7 @@ export class FirebaseServerAppImpl
   implements FirebaseServerApp
 {
   private readonly _serverConfig: FirebaseServerAppSettings;
-  private _finalizationRegistry: FinalizationRegistry<object>;
+  private _finalizationRegistry: FinalizationRegistry<object> | null;
   private _refCount: number;
 
   constructor(
@@ -67,9 +67,12 @@ export class FirebaseServerAppImpl
       ...serverConfig
     };
 
-    this._finalizationRegistry = new FinalizationRegistry(() => {
-      this.automaticCleanup();
-    });
+    this._finalizationRegistry = null;
+    if (typeof FinalizationRegistry !== 'undefined') {
+      this._finalizationRegistry = new FinalizationRegistry(() => {
+        this.automaticCleanup();
+      });
+    }
 
     this._refCount = 0;
     this.incRefCount(this._serverConfig.releaseOnDeref);
@@ -97,7 +100,7 @@ export class FirebaseServerAppImpl
       return;
     }
     this._refCount++;
-    if (obj !== undefined) {
+    if (obj !== undefined && this._finalizationRegistry !== null) {
       this._finalizationRegistry.register(obj, this);
     }
   }

From 17bff19fdbde675faa6bf5c5c56565658b80c414 Mon Sep 17 00:00:00 2001
From: DellaBitta <drsanta@google.com>
Date: Fri, 28 Jun 2024 09:58:03 -0400
Subject: [PATCH 2/2] Changeset

---
 .changeset/clever-dryers-double.md | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 .changeset/clever-dryers-double.md

diff --git a/.changeset/clever-dryers-double.md b/.changeset/clever-dryers-double.md
new file mode 100644
index 00000000000..fcc4d4f7e30
--- /dev/null
+++ b/.changeset/clever-dryers-double.md
@@ -0,0 +1,6 @@
+---
+'@firebase/app': patch
+'firebase': patch
+---
+
+Guard the use of `FinalizationRegistry` in `FirebaseServerApp` initialization based on the availability of `FinalizationRegistry` in the runtime.