Web Links Crashing Safari, Mail, Chrome, and Other Apps on iOS 9.3 [Updated]

A significant number of iPhone and iPad users on the MacRumors discussion forums, Apple Support Communities, and Twitter have reported an apparent iOS bug that causes Safari, Mail, Messages, Notes, Chrome, and select other preinstalled and third-party apps to crash or freeze after tapping or long-pressing on web links.


The issue has grown wider since iOS 9.3 was publicly released last week, but some users also claim to be affected on iOS 9.2.1 and earlier software versions. A wide range of devices appear to be affected, including the iPhone 5, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPad Air 2, and iPad mini.

AppleSupport-iOS-9-3-links
Apple has yet to comment on the matter, but some users have suggested turning off JavaScript under Settings > Safari > Advanced as a temporary solution. However, this will degrade your web browsing experience. Force closing Safari or other affected apps, or restarting the iPhone entirely, does not appear to fix the problem.

The underlying cause of the problem remains unconfirmed, but there is speculation that the Booking.com app may be a contributing factor. Over the weekend, a Russian-language video was uploaded to YouTube that demonstrates how Safari links become unresponsive on iPad Air 2 after the popular travel app was installed.


Mobile specialist Ben Collier believes there may be a related bug that breaks iOS 9's new Universal Links feature when an app's site association file is beyond a certain size, and iOS developer Steven Troughton-Smith confirmed that the Booking.com app had an unnecessarily large 2.3MB file for deep linking.

In iOS 9 Apple introduced Universal Links, these allow app developers to associate their website and app, so links to the website can open the app up automatically if installed. For example, following a link to a Guardian article opens up the Guardian app to that specific article instead of their website. […]

It looks like there's a bug in iOS that completely breaks the Universal Links if it gets served an app association file that's too large. […]

It seems that the large size of their file, due to it having every URL from their website inside it breaks the iOS database on the device. Apple allows you to have pattern based matching, so instead of having to include every hotel's URL in the association file, Booking.com could just put /hotel/* to match all the hotels on their site.

Booking.com has since reduced the file to around 4 KB, which should prevent the issue from affecting additional users, but it appears that the deep linking iOS database will remain corrupted on devices already affected until Apple releases a software update.

In the meantime, some users have resorted to using Puffin, iCab, or select other third-party web browsers to bypass the web links issue. Apple engineers are seemingly aware of the issue, and this article will be updated with new information as it becomes available.

Update: Collier now points towards tweets indicating that the issue may be related to the Shared Web Credentials daemon, which allows apps and websites to share login credentials for the purposes of Universal Linking.

Update 2: Apple has confirmed to TechCrunch that it is working on a fix for the issue and plans to release it in an upcoming software update.

Top Rated Comments

8692574 Avatar
105 months ago
Meanwhile I'm here on a 6S having experienced absolutely none of all of these issues...
Thanks for letting us know...

Breaking news: the world does not revolve around you ;)
Score: 26 Votes (Like | Disagree)
Dilster3k Avatar
105 months ago
I remember a time when OS releases were stable, under Scott Forstall of course. Everything from hardware to software is just flimsy now.
Score: 21 Votes (Like | Disagree)
soupcan Avatar
105 months ago
Meanwhile I'm here on a 6S having experienced absolutely none of all of these issues...
Score: 20 Votes (Like | Disagree)
Piggie Avatar
105 months ago
If I'm honest I can never understand this.

If this was Windows, and Microsoft had to, which they do, make things work on millions of not billions of permutations of hardware, built from anyone from a giant company, down to a child in his bedroom from second hand bits, then sure, we'd all expect things like this.

But when YOU build the hardware yourself, and there are such a tiny number of variations out there, it always amazes me, how, even after multiple beta's you can have things like this happen.

Apple have it so easy.
Score: 19 Votes (Like | Disagree)
69Mustang Avatar
105 months ago
I remember a time when OS releases were stable, under Scott Forstall of course.
Revisionist history is not real history.
Score: 19 Votes (Like | Disagree)
Crosscreek Avatar
105 months ago
For how many Betas and still this happens....and every time?
Score: 16 Votes (Like | Disagree)

Popular Stories

Delta Feature

Delta Game Emulator Now Available From App Store on iPhone

Wednesday April 17, 2024 9:58 am PDT by
Game emulator apps have come and gone since Apple announced App Store support for them on April 5, but now popular game emulator Delta from developer Riley Testut is available for download. Testut is known as the developer behind GBA4iOS, an open-source emulator that was available for a brief time more than a decade ago. GBA4iOS led to Delta, an emulator that has been available outside of...
iOS NES Emulator Bimmy Feature

NES Emulator for iPhone and iPad Now Available on App Store [Removed]

Tuesday April 16, 2024 11:33 am PDT by
The first approved Nintendo Entertainment System (NES) emulator for the iPhone and iPad was made available on the App Store today following Apple's rule change. The emulator is called Bimmy, and it was developed by Tom Salvo. On the App Store, Bimmy is described as a tool for testing and playing public domain/"homebrew" games created for the NES, but the app allows you to load ROMs for any...
iPhone 15 Pro Action Button Translate

All iPhone 16 Models to Feature Action Button, But Usefulness Debated

Tuesday April 16, 2024 6:54 am PDT by
Last September, Apple's iPhone 15 Pro models debuted with a new customizable Action button, offering faster access to a handful of functions, as well as the ability to assign Shortcuts. Apple is poised to include the feature on all upcoming iPhone 16 models, so we asked iPhone 15 Pro users what their experience has been with the additional button so far. The Action button replaces the switch ...
maxresdefault

Hands-On With the New App Store Delta Game Emulator

Wednesday April 17, 2024 12:19 pm PDT by
A decade ago, developer Riley Testut released the GBA4iOS emulator for iOS, and since it was against the rules at the time, Apple put a stop to downloads. Emulators have been a violation of the App Store rules for years, but that changed on April 5 when Apple suddenly reversed course and said that it was allowing retro game emulators on the App Store. Subscribe to the MacRumors YouTube channel ...
iOS 18 Siri Integrated Feature

iOS 18 Will Add These New Features to Your iPhone

Friday April 12, 2024 11:11 am PDT by
iOS 18 is expected to be the "biggest" update in the iPhone's history. Below, we recap rumored features and changes for the iPhone. iOS 18 is rumored to include new generative AI features for Siri and many apps, and Apple plans to add RCS support to the Messages app for an improved texting experience between iPhones and Android devices. The update is also expected to introduce a more...