1266708 - youtube slidebar isn't working properly. It goes ups and down autometically.

Status: NEW

(Firefox :: Keyboard Navigation, defect)

Description

[Nawaf Chowdhury Akash]

Attachment: youtube.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160421030302

Steps to reproduce:

1.go to youtube .com
2.play any video.
3.hold shift and then press page down (shift+page down).
4.then holding the shift key press page up (shift+page up).
5.holding the shift key again press page down.and hold both keys for a while (shift+page down).
6.have a glance.it will help to understand the bug 
https://drive.google.com/open?id=0B3eBbVhV1FyEQTZzN3N1S1JQSWc 


Actual results:

on step 5 slidebar is not working properly.instead of going at the end of the page it goes ups and downs autometically. and also it autometically selects all the words in the page.


Expected results:

the slidebar should go to at the end of the page and should stay there. and the words shouldn't be select while pressing those keys

Comment 2

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

Shift + Page Up/Down always selected text, just use this buttons without Shift
or I'm missing sth?

Comment 3

[YF (Yang)]

I see the scroll bar jumps back when text is selected with Shift+PageDown and press the Shift+PageDown again.

In Fx10.0 to [1], the scroll will stopped on the middle and selected the text on the right side bar when press the Shift+PageDown keys repeatedly, Shift+PageUp works fine for jump to begin.

This issue only occurs when the comments has been loaded.

[1]: Reproduction range since: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c00a9c1940c5&tochange=762e95608da3 Scroll