How to make a bot for registration on the site?

Question

JavaScript

Bot for registration on the site?
There, it seems, you need to put an extension for chrome or Mozilla. Perhaps it would be better in mozilla, something along the lines of tampermonkey .
1 - The script enters the site
2 - click the registration button (most likely it finds it by class="" and then the .click() event)
3 - enters data (something like $('user_name').val('automated_name') )
4 - goes to another tab
5 - opens a message (again finds it by class and does a click event)
6 - follows the link to confirm (same as the previous one)
Voila, we have a bot.
I'm sure there are those who toiled like this, maybe there are sketches on Git, some scripts :)
How to organize everything, tell me please?

Answer 1

selenium, phantom.js, casper.js, nightmare.js