Used Firefox web page translation feature for the first time. Up until now it was mostly annoyance due to drop down appearing on it's own (is there a setting to turn that off?).
The German website was translated seemingly well. Of course I can't verify, but since it was just a simple read, it was good.
One thing where it didn't work that well was initial cookie prompt, where it translated text, but not text on buttons, had to guess which one does what.