At least here in Germany it is opt in. As the algorithm runs locally, I don't see a big issue with this.
I didn't opt in to this feature to be clear, and ghostery should help for tracking.
But if I wouldn't have this option, I would be more willing to have my history evaluated locally, instead of having my history evaluated for 90% of the sides on some third party advertisers owned system.
At least here in Germany it is opt in. As the algorithm runs locally, I don't see a big issue with this.
I didn't opt in to this feature to be clear, and ghostery should help for tracking.
But if I wouldn't have this option, I would be more willing to have my history evaluated locally, instead of having my history evaluated for 90% of the sides on some third party advertisers owned system.