This threw me off, I really didn't expect Mozilla to bundle in something like this.

However, here's the info, straight from the source: https://blog.mozilla.org/press-uk/2017/10/06/testing-cliqz-i...

Looks like < 1% of installs in Germany will get this preinstalled. Here's how to remove if you're one of the unlucky ones: https://support.mozilla.org/en-US/kb/cliqz-recommendations-f...

Finally, Cliqz has a Firefox Test Pilot program (German-only): https://testpilot.firefox.com/experiments/cliqz