Firefox says that when it decided to create a new browsing app for Android, it wanted the browser to be faster and more reliable than its current Stable app. It also wanted it to be based on its own GeckoView mobile browser engine; this would allow users to enjoy "the highest level of privacy and security available on the Android platform." The company also didn't want Android users to have to decide "between privacy and a great browsing experience."
Firefox announced today that starting this coming Tuesday, January 21, 2020, a new version of Firefox Nightly will be launched. This version is based on the Firefox Preview Beta that was originally launched last June. If you've used the Firefox Preview app, you've probably enjoyed features like the bottom-placed navigation bar, the faster page rendering, and the more modern-looking UI.
The Firefox Nightly app can be installed from the Google Play Store, although this version of the browser is not stable and isn't meant for the average guy or gal unless they are a developer or love checking out new features first. Firefox says that starting next Tuesday when the Firefox Nightly app starts using features from Firefox Preview, to users "it’ll feel like a big exciting upgrade of their browsing experience once they update the app."
Firefox says that over the last couple of months it has been examining the problems that users wanted Firefox to get rid of. These issues were determined by listening to user feedback and by analyzing usage behavior. This allowed the developers to study what changes they needed to make.
This Spring, the new Firefox for Android will go into Beta with the Stable version of the app getting the update in the middle of this year. Meanwhile, you can install these different versions of Firefox for Android from the Google Play Store: