1326721 - Text selection is illogical on elements with "user-select:none;"

Status: NEW

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

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:
1. Open https://martijnkorteweg.github.io/4096/
2. Move mouse between line "Join the numbers and get to the 4096 tile!" and the square w/ numbars
3. Hold left mouse button, move mouse to the left and right
4. Move mouse to the square, move mouse to the left and right
5. Move mouse between the square and the 1st line of text after it, move mouse to the left and right

AR:
 Step 3 - text selection 1st line of text after square responds to mouse movements, but it is far away
 Step 4 - text selection 1st line of text after square doesn't respond to mouse movements
 Step 5 - text selection 1st line of text after square responds to mouse movements
ER:  Either X or Y
 X) Steps 3,4,5 - text selection in 1st line of text after square should respond to mouse movements
 Y) Steps 3,4 - text selection in 1st line of text after square shouldn't respond to mouse movements
    Step 5 - text selection in 1st line of text after square should respond to mouse movements

Comment 1

[Hani Yacoub, Desktop QA]

Tested on Windows 7 64bit with FF Nighlty 49 and FF Nightly 53.0a1 and I can reproduce it.

Comment 2

[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.