Safari defaults to rendering webpages at 60fps, even on ProMotion devices capable of refreshing at up to 120Hz. As a result, scrolling can feel less fluid than it does in browsers like Chrome or Firefox on the same hardware. Fortunately, a hidden setting in Safari’s Feature Flags lets you remove this limit and enable smoother page rendering.
This tweak only works on devices with a ProMotion display, including the iPhone 13 Pro and later Pro models, iPhone 17, iPhone Air, and ProMotion-equipped iPad Pro models. It will not have any effect on devices without ProMotion support, such as the iPhone 16, iPhone 16 Plus, iPhone 16e, and iPhone 17e.
How to Remove Safari’s 60fps Scrolling Limit
- Launch the Settings app, scroll down and tap Apps, then tap Safari. Scroll to the bottom of the Safari settings page and tap Advanced.
- At the bottom of the Advanced screen, tap Feature Flags. This is a developer-facing menu, but it does not require Developer Mode or an Apple Developer account to access.
- Scroll through the Feature Flags list until you find Prefer Page Rendering Updates near 60fps. The settings are listed alphabetically, so you’ll find it toward the lower half of the list.
- The option is enabled by default, which limits Safari to 60fps page rendering. Turn the toggle off to remove the cap and allow Safari to render at up to 120Hz on supported devices.
- Force quit Safari by opening the app switcher and swiping the Safari card upward, then reopen the app. The change takes effect immediately.
Early discussions suggested the setting only affected JavaScript animations rather than scrolling. However, testing has shown that disabling the 60fps rendering preference allows Safari to render supported webpage content at up to 120Hz on compatible ProMotion devices. The improvement is noticeable throughout the browsing experience, especially when scrolling through long webpages or interacting with content that benefits from higher refresh rates.
Battery life is worth keeping in mind. Running Safari at 120Hz causes the display to refresh more frequently than at 60Hz, which can increase power consumption during extended browsing sessions. For most users, the impact is relatively small, but if maximizing battery life is a priority, you can always re-enable the setting.
One thing to remember is that iOS updates may reset Safari’s Feature Flags to their default values. If scrolling starts feeling less smooth after installing a software update, go back to Settings > Apps > Safari > Advanced > Feature Flags and check whether Prefer Page Rendering Updates near 60fps has been turned back on.
This hidden setting has been available since Safari 26.3 but only recently gained wider attention. With ProMotion now available on more recent iPhone models, including the iPhone 17 lineup except for the iPhone 17e, more users can take advantage of smoother 120Hz browsing in Safari.
