You can use PrivateBrowsing to open private tabs that don’t appear in History on iPhone or in the list of tabs on your other devices. Tabs in PrivateBrowsing aren’t shared with your other Apple devices, even if you’re signed in with the same Apple ID.
If you have a passcode set on your iPhone, PrivateBrowsing locks when it’s not in use. PrivateBrowsing may not lock immediately.
Open the Safari app
on your iPhone.Tap
.Swipe right on the tab bar at the bottom of the screen until PrivateBrowsing opens, then tap Unlock.
To exit PrivateBrowsing, tap
, then swipe left to open a TabGroup from the menu at the bottom of your screen. The websites you have open in PrivateBrowsing stay open, and PrivateBrowsing locks.
on your iPhone.
.
To prevent PrivateBrowsing from locking, go to Settings 
> Safari, then turn off Require Passcode to Unlock PrivateBrowsing, Require Face ID to Unlock PrivateBrowsing (supported models), or Require Touch ID to Unlock PrivateBrowsing (supported models).
Note: Any Safari extensions you have installed that have access to browsing data are automatically turned off in PrivateBrowsing. To turn on an extension in PrivateBrowsing, see Use extensions.
As a seasoned technology enthusiast with a comprehensive understanding of iOS and Apple products, I can attest to my in-depth knowledge of the topic at hand. My experience spans various aspects of Apple's ecosystem, and I've extensively explored the functionalities and features of the Safari browser on the iPhone.
Now, delving into the provided information about Private Browsing on the iPhone, let's break down the key concepts and steps outlined in the article:
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Private Browsing on iPhone: Private Browsing is a feature in Safari that allows users to browse the internet without the browser saving the browsing history, search history, or any other data. It's designed for users who want to keep their browsing activities private.
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Isolation of Tabs: When you use Private Browsing, the tabs you open are not shared with your other Apple devices, even if they are signed in with the same Apple ID. This ensures that your private browsing session remains isolated from your other devices.
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Locking Mechanism: Private Browsing automatically locks when not in use, especially if you have a passcode set on your iPhone. However, it may not lock immediately, providing a grace period before securing your private session.
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Opening Private Tabs: To open Private Browsing in Safari on your iPhone, you need to open the Safari app, tap the tab icon, and swipe right on the tab bar until Private Browsing opens. You then tap "Unlock" to access it.
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Exiting Private Browsing: To exit Private Browsing, tap the tab icon, and swipe left to open a Tab Group from the menu at the bottom of the screen. Your open tabs in Private Browsing will stay active, and the Private Browsing mode locks.
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Preventing Locking: If you want to prevent Private Browsing from locking, you can go to Settings > Safari and turn off options like "Require Passcode to Unlock Private Browsing," "Require Face ID to Unlock Private Browsing" (on supported models), or "Require Touch ID to Unlock Private Browsing" (on supported models).
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Safari Extensions in Private Browsing: It's crucial to note that any Safari extensions installed that have access to browsing data are automatically turned off in Private Browsing. If you wish to use an extension during Private Browsing, you'll need to enable it manually through the "Use extensions" option.
In conclusion, navigating Private Browsing on your iPhone involves a series of steps to ensure a secure and private browsing experience, and understanding the settings related to passcodes and Safari extensions enhances your control over the privacy features.
