1266710 - youtube slidebar isn't working properly. It goes ups and down autometically.

Status: RESOLVED DUPLICATE of bug 1266708

(Firefox :: Untriaged, 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