I am trying to find a unique locator of the "update profile picture button" in my Facebook account to use it for automation test (selenium webdriver with java).

I use `driver.findElement(By.className("_156p")).click();`, but it doesn't work.

What should I use?!

[![enter image description here](https://i.stack.imgur.com/xNIRF.png)](https://i.stack.imgur.com/xNIRF.png)