Google Chrome offers the ability to secure your Incognito tabs using a fingerprint authentication feature.
This feature is designed to improve your privacy and security with a fingerprint scanner or PIN/Password, which is required for users to open Chrome with active Incognito tabs. The new fingerprint-secured Incognito mode in Chrome is not supported on all devices, but you can enable the feature outside of the Chrome settings.
If you’re running the latest version of Chrome for Android, here is how you can activate fingerprint authentication for Chrome Incognito mode.
Go to the Google Chrome app on your Android phone and enter this link in the search bar: chrome://flags/#incognito-reauthentication-for-android
Hit the Default button and choose the Enabled option from the drop-down menu.
Click on the Relaunch button available at the bottom of the page.
Enabling fingerprint lock for Chrome’s incognito mode
Open Chrome on your Android device.
Tap on the three-dot menu located at the top right corner.
Go to the Settings option from the drop down menu.
Tap on the Privacy and security tab.
Turn the toggle on for Lock Incognito tabs when you leave Chrome.
Proceed by scanning your fingerprint.
To open those Incognito tabs in Chrome, select the Unlock Incognito option that is available at the bottom of the page and scan your fingerprint. If your Android device does not support a fingerprint sensor, you can choose to open those tabs using a passcode. While some users currently need to manually enable the feature, everyone will soon be able to use it.