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[Web][FireFox][Windows]: Uncaught Error in Firefox on click event using template app (using Wacom pen) #75559

Description

@Leffe108

Steps to Reproduce

  1. Run flutter create bug.
  2. flutter run -d web-server
  3. Open firefox and go to localhost:{port number}
  4. When the app has loaded, open dev console (F12)
  5. Click on the background (or any button etc.) For example I click where I show with a red arrow on this picture:

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As an alteranative you can click on the + button which will not work and also just emit uncaught exceptions in F12 console.

Expected results:

I expect no errors in the F12 console, and espcially not uncaught errors from the framework.

Actual results:

I get loads of uncaught errors in the F12 console of Firefox. Also the + button does not work if you click it (it also emit these errors and the business logic that increment the value never runs)
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Logs
Analyzing bug...
No issues found! (ran in 3.8s)
[✓] Flutter (Channel beta, 1.26.0-17.3.pre, on Microsoft Windows [Version 10.0.19041.746], locale sv-SE)
    • Flutter version 1.26.0-17.3.pre at C:\Users\Leif\Programmering\Libraries\flutter
    • Framework revision 4b50ca7f7f (34 hours ago), 2021-02-04 19:44:27 -0800
    • Engine revision 2c527d6c7e
    • Dart version 2.12.0 (build 2.12.0-259.8.beta)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\Leif\Programmering\Android\android-sdks
    • Platform android-30, build-tools 30.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[✓] Android Studio (version 4.1.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[✓] VS Code, 32-bit edition (version 1.52.1)
    • VS Code at C:\Program Files (x86)\Microsoft VS Code
    • Flutter extension version 3.18.1

[✓] Connected device (2 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 88.0.4324.146
    • Edge (web)   • edge   • web-javascript • Microsoft Edge 88.0.705.56

• No issues found!

I have reproduced the errors also when firefox run in safe-mode, disabling all plugins and I have Firefox 85.0.1
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assigned for triageissue is assigned to a domain expert for further triagebrowser: firefoxonly manifests in Firefoxf: gesturesflutter/packages/flutter/gestures repository.frameworkflutter/packages/flutter repository. See also f: labels.platform-webWeb applications specificallyplatform-windowsBuilding on or for Windows specificallyr: fixedIssue is closed as already fixed in a newer version

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