Google Chrome browser on iOS devices has a neat feature: The ability to lock incognito tabs with Face ID, Touch ID, or a passcode. Here
Chrome Incognito can require a fingerprint on Android - 9to5Google
Protect Your Private Tabs with Face ID or Touch ID So Others Can't Snoop Through Your Browsing Secrets « iOS & iPhone :: Gadget Hacks
How To Lock Chrome Incognito Tabs With Face ID on iPhone
Firefox Focus can lock your tabs behind Face ID
How to lock Google Chrome's incognito tabs with a Fingerprint or Face ID
Chrome 92 for iOS adds 'Full Page' screenshot support - 9to5Google
Ways to fix Safari Private Browsing Not Available on iPhone or iPad
How to Lock Chrome Incognito Tabs With Face ID on iPhone and iPad - MacRumors
How to use Locked Private Browsing in Safari - Apple Support
Android Users Can Now Hide Chrome Incognito Tabs With Their Fingerprint
How to enable Face ID lock for Chrome Incognito tabs on iPhone
Google Chrome Beta on iOS Lets You Lock Incognito Tabs With Face ID - MacRumors
Turn Private Browsing on or off on your iPhone - Apple Support
Face ID & Touch ID can now unlock your incognito tabs on Chrome for iOS - PhoneArena