Firefox is a very modern open source and versatile browser designing for the most demanding and preferential user. It has a very simple interface and is extremely customizable thanks to its extensive add ons. It incorporates many tools for secure browsing and has a good streamlined password manager. You can sync your preferences between your devices and the smart bookmark will help you access your favorite websites easily. It has a very convenient, simple and practical download manager which can be operated with minimal clicks. For those who are left handed Firefox also accomodates left sided scroll bar.The browser has countless niche features with very specific yet extremely innovative solutions for a large spectrum of users.