From the article: 1. Other mobile browsers update independently from the OS, whereas Safari is only updated when there is an update to iOS. iOS devices that ar

From the article: 1. Other mobile browsers update independently from the OS, whereas Safari is only updated when there is an update to iOS. iOS devices that are no longer supported with newer versions of iOS cannot update to the latest version of Safari. 2. All browsers in iOS are based on Webkit: There are Chrome and Firefox versions for iOS but those use the same engine as Safari in iOS. This is because of an Apple guideline which mentions that all iOS browsers must use Webkit. These users can't fix this problem without getting a new device.