Why is the clear history in favorites no longer operable?
Why is the clear browsing history function in favorites now inoperable after IOS 11 update?
Restrictions enabled?
Settings > General > Restrictions
Enter the passcode and tap "Disable Restrictions".
Settings > Safari > Clear History & Website Data
Tap " Clear History and Website Data"
For details: https://support.apple.com/en-us/HT204759
Why is the clear history in favorites no longer operable?