Chrome
The feature takes around 20 seconds to turn on and once it is active, returning to the browser from outside of the app will require biometric authentication, Face ID, fingerprint, or whatever your phone uses before your incognito tabs become visible again. Because you forgot to close a tab, even if you trust the person entirely, there is a difference between choosing to share something and having it simply be visible.
Inside this menu, you will find the option which says Lock Go into Incognito Tabs When You Leave Chrome. Most people who use incognito mode on their phones have a fairly simple expectation: that whatever they are browsing stays out of sight when they are not looking at it. The reality, until you change one setting, is a little more uncomfortable than that. By default, when you open an incognito tab in Chrome on your phone and then switch to another app or hand your phone to someone, those tabs sit right there waiting. Anyone who opens Chrome after you get a direct view of whatever you were browsing. The incognito label is still there at the top, but the content is fully visible. For a feature that is supposed to offer some degree of privacy, that is a fairly significant gap. Chrome offers an in-built fix to the problem. The browser offers a feature called Lock Incognito Tabs When you Leave Chrome. In case your device does not have a biometric setup, then you can unlock Chrome using PIN or passcode. In order to access the feature, open the Chrome browser on your smartphone and tab on the three-dot menu placed in the top right corner of the screen. After this, go to Settings and then tap on Privacy and Security. Just toggle on the feature and the setup is now complete. To confirm whether the feature is working or not you can simply open a new incognito tab and load anything in it. Once done, wait for a few seconds and they press the home button or swipe away from the Chrome browser and access any other app on your phone. Now after sometime again tap on Chrome and return to the browser. You will notice that instead of dropping you straight back into your open incognito tabs, Chrome will prompt you to authenticate first. After you authenticate, then only your Incognito tabs will reappear. The most obvious scenario is a shared phone, or a moment where you hand your phone to someone to show them a photo or let them make a call. The lock feature removes that variable entirely without requiring you to manually close and reopen your incognito session every time you leave the browser. The mode does not help in hiding your activity from your service provider, from the websites you visit, from your employer if you are on a work network, or from any entity monitoring traffic at the network level. Your IP address is visible throughout an incognito session just as it is in regular browsing. The lock feature of Chrome solves one practical problem which is keeping your open tabs from being casually visible to whoever picks up your phone next.
Within that scope, it works exactly as advertised and is worth turning on today.