1327911 - Web page suddenly cancels text selection and doesn't redraw it

Status: NEW

(Core :: DOM: Selection, defect, P5)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:
1. Open https://lenta.ru/news/2016/07/23/obamajokes/
2. Hover mouse over the title of the article (selector ".b-topic__title"), hold left mouse button
3. Move mouse to the right to select some portion of the text
4. Move mouse to the center of Flash plugin
5. Move mouse vertically to the same line where you started selection,
   then move mouse horizontally to the same place where you started selection

AR:
 Selection is canceled in unusual non-usable way: some letters are displayed on the black background,
 but it's not a real selection: it won't go away if I click anywhere on the page, and it won't be
 copied to clipboard if I press Ctrl+C.

ER:  Either X or Y
 X) Selection should follow mouse pointer:  after Step 5 there should be no text selected
 Y) Selection should cancel in normal way at least:  no blue highlight.

Comment 1

[Cosmin Muntean [:cmuntean], Ecosystem QA]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0
Firefox 50.1.0, Build ID: 20161208153507

I have managed to reproduce the issue on the latest Firefox (50.1.0) release and latest Nightly (53.0a1) build. After following the provided steps, it seems that the selection is not longer working after hovering the video.

Comment 2

[Julien Cristau [:jcristau]]

Too late for firefox 52, mass-wontfix.

Comment 3

[Jens Stutte [:jstutte]]

Bulk-downgrade of unassigned, >=3 years untouched DOM/Storage bug's priority.

If you have reason to believe this is wrong, please write a comment and ni :jstutte.