Apple only says: Note: Apps containing content blocking extensions for Safari on iOS are available only on 64-bit devices, due to performance limitations of 32

Apple only says: Note: Apps containing content blocking extensions for Safari on iOS are available only on 64-bit devices, due to performance limitations of 32-bit devices. https://developer.apple.com/library/prerelease/ios/releasenotes/General/WhatsNewInSafari/Articles/Safari_9.html https://developer.apple.com/library/prerelease/ios/releaseno...