Only an initial phase of Project Quantum has been completed so far, but Mozilla said that the new changes have already made Firefox twice as fast as it was a year ago. The support for Flash on Android is on its way to being a bit smaller though as the latest beta build of Firefox on Android is dropping support for Flash with the next major update which will be version 56. It is, in fact, taken from its Project Quantum endeavor to speed up Firefox and catch up with the market.
The speed boost and new features coming to the next version of Firefox are dramatic enough that Mozilla has given it a brand new name: Firefox Quantum. This has been happening all a year ago, and Firefox engineers have described the process as "replacing a jet engine while the plane is still in flight". One simple way of estimating browser performance is with Speedometer 2.0, a (still-in-development) benchmark that simulates modern web applications. We can see in the video below that the new Firefox seems to win often (but not always) against Chrome. Firefox is also promised to use 30% less RAM than Chrome through the use of smart prioritization of active tabs. This is due to Firefox's new multi-process architecture that doesn't isolate every website or extension in its own process and sandbox. It's also the first update to require version Android 4.1 or higher, so naturally it makes sense that Mozilla would be dropping support for a feature that isn't officially supported.
The new, minimalist design introduces square tabs, smooth animations, and a Library, which provides quick access to your saved stuff: bookmarks, Pocket, history, downloads, tabs, and screenshots. Firefox will also be able to take advantage of high-resolution screens that are now common even on smartphones.
Other special changes include a fast and fluid Photon design and built-in Pocket read-it-later app.
Mozilla has released the Firefox 57 beta, a completely overhauled browser that will be called Firefox Quantum when it launches in stable form next month. Mozilla noted that the New Tab page can still be customized by users via add-ons.
Right now, Firefox 57 - set for release on November 14 - looks like a groundbreaking and highly anticipated release.
Project Quantum doesn't end with the features enumerated above. Although it can't declare victory over Chrome yet, it's undeniably faster than its old Firefox version.