The effects of those tons of performance improvements are pretty obvious from the first few seconds you start browsing. The star of the show is the new, next-generation engine which now allows Firefox to make the most of all your computer's CPU cores. New and improved engine is sure to win back former Firefox users Instead, the developer version is now based on the Beta channel. One of the main differences between the latest developer editions and the ones from the past is that they're no longer based on the Aurora channel which has now been scrapped. Firefox Developer Edition, also called Firefox Quantum, allows users to get their hands on the latest features and development tools which will eventually find their way into the mainstream, stable versions of Firefox.
