The covert tracking allows Meta and Yandex to bypass core security and privacy protections provided by both the Android operating system and browsers that run on it.
https://arstechnica.com/security/2025/06/meta-and-yandex-are-de-anonymizing-android-users-web-browsing-identifiers/
Meta Pixel halts Android localhost tracking after disclosure • The Register
Following the disclosure, researchers observed that Meta's Pixel script stopped sending data to localhost and that the tracking code was largely removed. The move may help Meta avoid scrutiny under Google Play policies, which prohibit covert data collection in apps.
https://www.theregister.com/2025/06/03/meta_pauses_android_tracking_tech/