splice

Engineer on the Tiles team here. That is not exactly true. We do not obtain the list if top sites. What we receive is the list of non-history tiles that has been shown to the user. i.e. if the Tile is a "known" tile, we'll capture the impression, or click. If it's not, we will receive an almost empty placeholder for that site, barring for the frecency score. This is along our philosophy of least amount of actionable data collected. For instance, if a user had one Tile we know about at the 5th position, we'd get something like: {"tiles":[{"score":42},{"score":32},{"score":22},{"score":8},{"score":3},{"id": 500, "score":2},{}],"locale":"ja","view":6} The id allows us to count impressions, clicks and whatnot for that Tile, the "score" allows us to gauge frecency, i.e. how important is the tile for the user, together with the position in the

We designed Suggested Tiles to respect user privacy. Instead of centrally collecting as much data about as many people as possible (the strategy of all other ad-tech companies), we distribute all possible ads to all users and let Firefox decide what to show. This prevents your data "leaking", while showing you relevant advertising that you can control. The user interface is designed to help you understand why you are seeing the ad, and to allow you to easily and permanently disable this type of advertising from your experience. Our goal is to provide effective, relevant advertising without sacrificing user privacy. For those interested in the transparency of this, all of the server-side software for this is on github: https://github.com/mozilla/splice https://github.com/mozilla/onyx https://github.com/mozilla/infernyx And tracked openly