Firefox For iPhone, iPad, iPod Touch.
Firefox for iPhone, iPad, iPod Touch is the free mobile web browser that puts the power of the open web in your hands. The official Mozilla Firefox iOS browser is fast, easy to use, & customizable, with the latest security and privacy features to help you stay safe on the internet.
Fast — Access, browse, and search the web at blazing speeds
Smart — Keep your favorite sites and mobile videos at your fingertips with smart searching, easy-to-use tabs, and desktop-to-mobile Sync features
Safe — Make sure your iPhone web browser stays safe & private with extensive security settings, add-ons, and features like Do Not Track

Q: My iPhone 5 has iOS 6 and Safari. I would like to be able to browsing with her using Firefox for iPhone. What options are available for this? Is there a Firefox client for iPhone, iPad or iPod Touch or any web site that can provide a bridge?

GD: Unfortunately you’re out of luck using it on iOS. All clients with message “Firefox For iPhone”,“Firefox For iPad” is 100% fake. Don’t pay, don’t download.