1462583 - Dragging fails to generate a Drag Image if the dragged item is 126px or smaller in both height & width.

Status: RESOLVED INCOMPLETE

(Core :: DOM: Copy & Paste and Drag & Drop, defect, P5)

Description

[jms]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0
Build ID: 20180517113820

Steps to reproduce:

Under Ubuntu 16.04 using a Hannspree HannS G HT231 touch screen. 

Create a html page with three imgs:  
<img src="./test.png" height="126px" width="126px" draggable="True">
<img src="./test.png" height="127px" width="126px" draggable="True">
<img src="./test.png" height="126px" width="127px" draggable="True">

Attempt to use the touch screen to drag each of the 3 images.




Actual results:

On the img with width & height of 126px no Drag Image is visible during dragging. Upon release of the drag the Drag Image appears and flys back to the source image.

Both the other two images have correct drag behaviour


Expected results:

The 126px height & width img should show a ghost DragImage during the drag.

Comment 1

[ovidiu boca[:Ovidiu]]

I tested this issue on Surface Pro 4 - Windows 10 with FF Nightly 62.0a1(2018-05-22) and I can't reproduce it. I don't have the exact device from the description. 
Jms, do you have any add-ons on your profile? If yes, please test if the issue is reproducible in safe mode, here is a link that can help you:
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

Can you please retest it with the latest Nightly build to see if it's reproducible on your end or not? Please download Firefox Nightly from here: https://nightly.mozilla.org/
Also, this might be an OS specific issue.

Comment 2

[Firefox Bug Husbandry Bot]

2019-03-06

This bug is part of a group of bugs which have had an open needinfo for at least 12 weeks.

The request for information has not been answered, and we can't move forward on the bug so we are closing it.

If the defect is still present, please reopen this bug with an updated report.