I am having issues connecting to Tor via Ruby - Watir webdriver.

I use the Tor Browser Bundle. The problem is that when I try to connect via Watir (Selenium) I cannot seem to open Tor instead of regular Firefox. 

Looking at similar issues I've tried the following:

    require 'watir-webdriver'
     
    profile = Selenium::WebDriver::Firefox::Profile.new
    
    profile['network.proxy.socks'] = '127.0.0.1' #the proxy tor uses
    profile['network.proxy.socks_port'] = 9150 #I cannot use 9050, 9150 works when I use Tor
    profile['network.proxy.type'] = 1
    
    browser = Watir::Browser.new :firefox, :profile => profile
    browser.goto [an .onion website]

When I use the before-mentioned code I nonetheless still open the normal firefox browser, and cannot connect to onion sites.

Any thoughts? Is there another way in which I need to connect the Tor browser to my webdriver profile?