Thanks to iOS 9 multitasking feature, with iPad Air 2, iPad mini 4 and iPad Pro users can make two applications side by side split screen display, but you can not let the two Safari windows side by side, but one section entitled Sidefari - Web browsing companion for Safari applications have been able to help you achieve this desire.
Splitscreen multitasking is only supported on iPad Air 2, iPad mini 4, and iPad Pro.
The iPhone version only supports opening shared links in a modal window of Safari View Controller through an action extension.
If you have any questions, please contact support.
Sidefari is a simple web browser that is designed to act as a companion to Safari.
With multitasking in iOS 9, Sidefari uses the new Safari View Controller to show an extra Safari-based browser on the side of your iPad's screen. Now you'll be able to have two websites simultaneously on the same screen while enjoying the full benefits of Safari, like content blockers.
But your iPhone won't be let out of the fun, as the app includes an action extension to open URLs in a modal window of Safari View Controller -- all without exiting the current app. All that's required is for the app being used to support action extensions sharing URLs.
Sidefari for iPad features:
+ Compatible with iPad Air 2, iPad mini 4, and iPad Pro
+ Safari View Controller integration; optimized for multitasking
+ Included action extension to open URLs in-app from anywhere (that includes Safari!)
+ History always visible for quick an easy access to a previously-browsed website
+ Option to delete and/or disable history
+ The same modal Safari View Controller experience described below is also available for iPad
Sidefari for iPhone features:
+ Compatible with all iPhones running iOS 9 or greater
+ Modal Safari View Controller browsing from inside other apps
+ Compatible apps include any that have access to the iOS extensions screen and are sharing URLs
+ A reliable, Safari-like experience
How to setup in three easy steps for iPad:
1. Open Safari
2. Swipe from the right edge of the iPad's screen to bring up the multitasking window and select Sidefari
3. Tap the separator between Safari and Sidefari to stick the second window on screen
How to setup in three easy steps for iPhone:
1. Open Safari
2. Tap the share icon button
3. On the lower row of icons, search for "More" to enable the "Open Modally in Safari" extension
Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch