Existing profile is not loaded

With the following code (Splinter 0.19, Selenium 4.12, Selenium browser 0.0.15, Selenium Firefox 2.0.8)

```
from selenium.webdriver.firefox.service import Service
from splinter import Browser

my_service = Service(executable_path='/snap/bin/geckodriver')
with Browser('firefox', service=my_service, profile="Test profile") as browser:
browser.visit("about:support")
sleep(120)
```
the profile is not loaded, and a temporary profile is loaded. The same happens when I use the absolute path to the profile.
What am I doing wrong? Or is the documentation not correct?