1921260 - Drag-and-drop of multiple files to HTML5 drag-n-drop area is broken in KDE sinse FF 128.0.b1

Status: RESOLVED DUPLICATE of bug 1908196

(Firefox :: Untriaged, defect)

Description

[aakumykov]

Attachment: FF-127.0.2 -- FF 128.0.b1 drag and drop bug.webm

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Steps to reproduce:

Drag and drop multiple files to some file upload area in website. This issue first appears in Firefox 128.0.b1 and alive to now. In previous version (FF 127.0.2) this bug is not present.

1. go to https://www.dragdrop.com/test/ or any "cloud storage" site.
2. drag and drop more than one file to upload it to the site.
3. you see only one (first) file is uploaded.

Actual results:

Only one (first) file of set is uploaded.

Expected results:

All dragged files should be uploaded.

Comment 1

[aakumykov]

There is a big question: it this KDE or Firefox bug?
I reproduce described behaviour in earlier versions of KDE (Debian 9.x): on Firefox release upgrade file drag and drop becomes broken.
So, it seems Firefox, not KDE issue...

Comment 2

[:gerard-majax]

Can you mozregression it?

Comment 3

[Ryan VanderMeulen [:RyanVM]]

Dupe of bug 1908196?

Comment 4

[aakumykov]

Attachment: mozregression--2024.05.01--2024.05.15.png

Comment 5

[:gerard-majax]

Thanks but can you share the link ?

Comment 6

[aakumykov]

Attachment: mozregression--2024.05.01--2024.05.15.log

Comment 7

[:gerard-majax]

Sounds like it confirms it is a dupe of 1908196

Comment 8

[aakumykov]

(In reply to :gerard-majax from comment #2)

Can you mozregression it?

Yes, I did it and attach screenshot and log.
Running mozregression-gui on Debian 12 amd64 with default parameters and date interval 2024-05-01 -- 2024-05-15
I am ready to provide other information.

Comment 9

[aakumykov]

(In reply to :gerard-majax from comment #5)

Thanks but can you share the link ?

6:11.62 INFO: Narrowed integration regression window from [936287e7, a1cad969] (3 builds) to [936287e7, 68955533] (2 builds) (~1 steps left)
6:11.62 INFO: No more integration revisions, bisection finished.
6:11.62 INFO: Last good revision: 936287e7cba7e0a07179c59e7c9c74adaefdb47c
6:11.62 INFO: First bad revision: 68955533eb96b6d019d77be1ec753b353827d5d0
6:11.62 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=936287e7cba7e0a07179c59e7c9c74adaefdb47c&tochange=68955533eb96b6d019d77be1ec753b353827d5d0