My browser opens random websites

[imanvn8]

When I connect to Wi-Fi browsers open randomly and start downloading random apps. It started from yesterday. I tried deleting the browser but it started with another browser.
It's really going on my nerves.

 

[Saga Lout]

MERGED QUESTION
Question from imanvn8 : "My browser opens randomly"

When I open my phone and connect it to Wi-Fi random websites open on my browsers. I deleted the browser but it started on another browser the websites opening randomly download apps on my phone.
I'm really tired of this.