Repro for issue 6865

Versions

firebase-tools: v13.4.1
node: v20.10.0
platform: macOS Sonoma 14.3.1

Steps to reproduce

1. Run the emulators
   • firebase emulators:start --project demo-project
2. Open "http://127.0.0.1:5000/" on a browser
3. Click the "Choose Files" btn
4. Select img-0-1mb.png,img-1-1mb.png,img-2-1.3mb.png,img-3-1.2mb.png,
5. Click "Upload" buttonn
   • Console logs show:

Upload files
Upload promises complete

6. Files should be uploaded to the Storage emulator

• "http://localhost:4000/storage/demo-project.appspot.com/temp"