What is the easiest thing to use to write a browser bot?

Question

JavaScript

On what to emulate the work of a person in the browser in terms of development speed and numerous possibilities.
1.c# webrowser
2.Write extensions for google chrome
3.Write extensions for mozilla
4.Use custom (analogue of CodeMonkey in my opinion) js for google chrome
5.Write custom js (CodeMonkey in my name) for mozilla
6. Use emulators on which make automatic layout tests and interface
7. Use the Clickerman program and etc.

Answer 1

www.seleniumhq.org

Answer 2

If you need paid and ready-made, then you can HumanEmulator or ZennoPoster. In principle, they have everything out of the box, and scripts for them are quite easy to write.

Answer 3

In Java, you can code such a thing ... =)

Answer 4

If on Windows, then VBS is also possible (it also works quickly)