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Summary:
In Safari View Controller, there are five buttons in the bottom toolbar, the fifth being a button to open the page being displayed in Safari.

However, Settings > General > Restrictions includes a setting to disable Safari. When Safari is disabled here, the button ceases to function but still appears normally, in the tint color provided to SFSafariViewController.

Steps to Reproduce:
1. Create an instance of SFSafariViewController in an app targeted for iOS 9.0.
2. Install the app in Simulator or on a compatible device and trigger the SFSafariViewController.
3. Exit the app and go to Settings > General > Restrictions.
4. Disable Safari.
5. Exit Settings and repeat steps 1 and 2.
6. Observe the "Open in Safari" button.

Expected Results:
When Safari is disabled in Restrictions, the "Open in Safari" button in Safari View Controller would be grayed out or hidden entirely.

Actual Results:
The button still appears as it would when Safari is not disabled (but it doesn't open Safari). The button appears as if it works but does nothing—silent failure.

Version:
iOS 9.0 [13A4293g]

Notes:
I'll reiterate that the button does not open Safari in spite of the Restrictions setting. It simply appears as if it would do something, then doesn't do that something.

Configuration:
iPhone 6 Plus 64GB U.S. Cellular (iPhone7,1)