WhatsApp, the Facebook-owned popular messaging app with more than 2 billion users, has been getting a lot of heat and losing users in recent weeks after announcing (and then delaying) changes to how it uses your data. It’s not done with how it’s tweaking privacy and security. Now, it’s adding a new biometric feature to the service to bring in a new authentication layer for those using its web and desktop versions. The company said that from today, it will let people add in a fingerprint, face, or iris scan to use WhatsApp on desktop or web by linking it to your mobile app, to be used alongside the existing QR code authentication. The feature is coming on the heels of what WhatsApp is describing as a “visual refresh” of the WhatsApp web page on the Android and iOS apps for linking and managing devices connected to your account.