iOS 27.3 Adds Vertical Tabs, Adaptive Dark Mode to Safari

In iOS 27.3, iPadOS 27.3 and macOS Golden Gate 27.3, Apple is introducing several enhancements to Safari, including vertical tabs and Adaptive Dark Mode. Vertical Tabs will be positioned on the left side of the display, utilizing icons to conserve space. Users have the option to make the tab bar wider, displaying website titles alongside the icons.

These vertical tabs will function seamlessly with both Topics and Tab Groups, aiding in the organization of web browsing. Developed features such as pinning tabs by dragging, swiftly switching between Tab Groups, and other functionalities will remain operational. Additionally, Safari will offer Adaptive Dark Mode for websites lacking a default dark mode design.

When a user browses to such a website with a bright background, Safari will present an option to "Try Adaptive Dark Mode." Upon tapping, Safari will render a Dark Mode version of the page, adjusting the background to a darker shade, modifying text contrast, inverting logos and graphics, recoloring vector artwork, lifting raised surfaces, and rebalancing layered shadows.

This adaptation is tailored to each website, applying only the necessary changes for optimal readability. Users can choose to enable Adaptive Dark Mode for all sites or on a site-by-site basis. Websites already possessing a native dark mode or featuring a dark design will not trigger Adaptive Dark Mode. Developers can prevent Adaptive Dark Mode from activating by adding a specific tag, ensuring the website displays as intended. These updates aim to enhance user experience and website accessibility.