With iOS 8, Apple has finally given third party developers access to some iOS features, including Photos, the keyboard and Safari among others. The new feature, called Extensions, allows third party apps to access and share data with iOS apps. For Safari this means that you can add "Action Extensions" for applicable apps and then use their tools without ever leaving Safari. For example, if you have a password manager like LastPass, for instance, you can add that extension and then use LastPass from within Safari. Here's how you set up extensions in Safari:
1. Open Safari and tap the Share button (bottom middle).
2. This brings up a variety of options. Scroll to the right on the bottom level until you see the "More" icon. Tap on it.