Qt for WASM does not trigger native keyboard on Firefox for Windows/Android

Not sure if this issue lies in Firefox or Qt, but either way it makes Qt for WASM quite unusable

Code

import QtQuick
import QtQuick.Controls.Basic

Window {
    width: 640
    height: 480
    visible: true

    Column {
        TextField {}
        TextInput {}
        Button { text: "Click me to remove keyboard focus" }
    }
}

Steps to reproduce

1. Run the code above using Qt for WASM single-threaded, on a device with a touchscreen (without setting QT_IM_MODULE)
2. Tap the TextField

Expected outcomes
When the TextField is tapped, its border lights up and the native virtual keyboard appears. We can use the native virtual keyboard to input text.

Expected outcomes were seen on the following (all with touchscreens):

• Chrome on Windows 10 22H1
• Edge on Windows 10 22H1
• Edge on Android 14
• Firefox on iOS 16
• Safari on iOS 16

Actual outcomes (Firefox on Windows with touchscreen + Firefox on Android)
When the TextField is tapped, its border lights up (expected). However, the native virtual keyboard does NOT appear (not expected).

Some interesting behaviour observed on Firefox on Android 14 (does not apply to Firefox on Windows):

• If I double-tap the TextField, the native virtual keyboard appears for a brief moment and then disappears.
• If I double-tap-and-hold the TextField, the native virtual keyboard remains open and can be used to input text.
• I get similar results with TextInput instead of TextField – however, they are triggered by single-tap instead of double-tap