1726676 - Firefox's dialog/pop-up letting through click events

Status: UNCONFIRMED

(Core :: DOM: UI Events & Focus Handling, defect, P3)

Description

[Kafji]

Attachment: repro.mkv

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0

Steps to reproduce:

1. Open dialog by right clicking or opening toolbar menu with clickable element right below the dialog.

2. Select an option in the dialog where there is a clickable element underneath it.

Reproduced on:

Version (Firefox): 92.0b6 (I don't think this is beta build related)
OS: Windows_NT 10.0 19042
Tablet: Wacom Intuos BT S CTL-4100WL
Tablet driver version: 6.3.44-1
Reproducible in troubleshoot mode.

Maybe related with https://bugzilla.mozilla.org/show_bug.cgi?id=1710712.

Actual results:

• Dialog option is selected, action is performed.
• Clickable element captures click event. I.e. if it's a link, Firefox will go to that document.

Expected results:

• Dialog option is selected, action is performed.
• Click event is not passed through to the element below the dialog.

Comment 1

[Kafji]

Ok. I don't think is only for dialog. New window also passing through events to the lower window.

Comment 2

[Kafji]

Attachment: repo_window.mkv

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

I assume you can't reproduce this with mouse.

edgar, can you reproduce this?

Comment 4

[Kafji]

(In reply to Olli Pettay [:smaug] from comment #3)

I assume you can't reproduce this with mouse.

Yes. Only with tablet/Wacom.

Comment 5

[Edgar Chen [:edgar]]

(In reply to Olli Pettay [:smaug] from comment #3)

edgar, can you reproduce this?

I cannot reproduce this with Microsoft Surface Pen, it seems a Wacom-specific issue?

Comment 6

[Edgar Chen [:edgar]]

Kafji, is this happened only on Nightly? Does switch dom.w3c_pointer_events.dispatch_by_pointer_messages pref to false help? Thanks!

Comment 7

[Kafji]

Attachment: 92b7_dispatch_by_pointer_messages.mkv

Comment 8

[Kafji]

Attachment: 92b7_persistent_popup_passthrough.mkv

Comment 9

[Kafji]

Attachment: 92b7_intermitten_window_passthrough.mkv

Comment 10

[Kafji]

(In reply to Edgar Chen [:edgar] from comment #6)

Kafji, is this happened only on Nightly?

I'm on the beta channel. Do you want me to test it on nightly build?

Does switch dom.w3c_pointer_events.dispatch_by_pointer_messages pref to false help? Thanks!

It doesn't.

On a related note. I can reproduce the popup passthrough consistently, but it seems that the window passthrough is intermittent.

Comment 11

[Edgar Chen [:edgar]]

(In reply to Kafji from comment #10)

I'm on the beta channel. Do you want me to test it on nightly build?

Yes, please. And does this also happen on the current release (91)? Thanks!

Comment 12

[Kafji]

(In reply to Edgar Chen [:edgar] from comment #11)

Firefox 93.0a1 20210824094724:

• with dispatch_by_pointer_messages = true: right click with Wacom didn't open the context menu
• with dispatch_by_pointer_messages = false: same as 92b7

I can't test on 91. It shares the same profile with the beta channel and I don't want to risk resetting my profile. Sorry.