Version 24 adds a Share menu that lets you add your most frequently-used sharing services like Facebook, Twitter, or e-mail for quick sharing. If you prefer a more physical approach, the new version also adds bump sharing, which lets you fist-bump your friends with other Android handsets to quickly send open tabs, news articles, or just about any page from the Web. This works via Near Field Communications technology so both devices must have an NFC chip.
Firefox also brings a built-in Reader with added benefits to improve legibility, including font-swapping between serif and sans-serif text, changing background and text colors to black on white or vice versa, and the ability to save articles for future reading.
You can grab Firefox for Android here.