Steps:

1. Create counter application
2. Run it in debug mode: flutter run -d chrome
3. Open the url in Firefox
4. See error in console

In general counter is working in Firefox in all modes. There is no errors in release mode.

Questions:

1. Do we have commitment to have errorless debug mode for Firefox?
2. If yes, we need presubmit testing on bots for this, with multiple supported versions of Firefox, including latest
3. If no, we should stop testing in debug mode on presubmit in G3, for some selected versions of Firefox

Right now testing in G3 in debug mode fails for some versions of Firefox, and is blocking usage of WeakReference in Flutter Framework: #130842

flutter --version
Flutter 3.14.0-3.0.pre.29 • channel master • git@github.com:flutter/flutter.git
Framework • revision 67ded4b080 (2 days ago) • 2023-08-10 18:51:23 -0400
Engine • revision b019ac62f2
Tools • Dart 3.2.0 (build 3.2.0-58.0.dev) • DevTools 2.26.1