Update packages/functions/src/service.ts

Co-authored-by: Daniel La Rocque <[email protected]>

Author: segevfiner

packages/functions/src/service.ts

@@ -122,7 +122,8 @@ export class FunctionsService implements _FirebaseService {
     // Resolve the region or custom domain overload by attempting to parse it.
     try {
       const url = new URL(regionOrCustomDomain);
-      this.customDomain = url.origin + url.pathname;
+      this.customDomain =
+        url.origin + (url.pathname === '/' ? '' : url.pathname);
       this.region = DEFAULT_REGION;
     } catch (e) {
       this.customDomain = null;