Line while scrolling in browsers

[Yoann]

Hello, anyone can tell me if it's possible how to get rid of the line appearing while scrolling in browsers ? I am a novice in linux so please be as simple as you can. I have a laptop hp envy m6 1266ef. Thanks in advance

[penglix]

Hello,

I have the same problem. Did you find a solution? Can you help me?

Thank you!