Do iPhone WebKit feature flags affect all browsers or just Safari?

Hello! Wondering if iphone webkit feature flags pertain to all browsers or just safari. I don’t use safari as the default browser on my iphone, so do i need the feature flag boxes ticked?

Posted on Aug 17, 2026 11:20 AM

Reply
Question marked as Top-ranking reply

Posted on Aug 17, 2026 2:34 PM

Those WebKit feature flags are developer/experimental settings, so you normally don’t need to change or manually check them at all. I’d leave them at their defaults unless you’re testing a specific web feature. Apple says the default state is how users are generally intended to experience those features.


As for other browsers, it depends on the browser engine they’re using. Most iPhone browsers use WebKit, although Apple now permits alternative browser engines in certain regions and circumstances.


So simply using a different default browser isn’t a reason to change those flags.

2 replies
Question marked as Top-ranking reply

Aug 17, 2026 2:34 PM in response to justcurious10

Those WebKit feature flags are developer/experimental settings, so you normally don’t need to change or manually check them at all. I’d leave them at their defaults unless you’re testing a specific web feature. Apple says the default state is how users are generally intended to experience those features.


As for other browsers, it depends on the browser engine they’re using. Most iPhone browsers use WebKit, although Apple now permits alternative browser engines in certain regions and circumstances.


So simply using a different default browser isn’t a reason to change those flags.

Do iPhone WebKit feature flags affect all browsers or just Safari?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.