Firefox adds progressive web apps in the version 58 beta along with a couple of other features. Progressive web apps of course are the most notable new change that Mozilla has added to the latest beta version of its popular mobile web browser. These are essentially web apps that will look and function like a native application but without having to be installed onto the device like one. This is beneficial not only from a space saving standpoint but it should also allow the web app to run faster and smoother than a native app, though that might vary based on the web app itself in addition to other factors like the device hardware.
There doesn't seem to be a list that Mozilla has put together that mentions every available PWA at the moment, but if you use Firefox for Android beta then as soon as you open the browser you should see a new button that sits next to the address bar that will allow you to add a progressive web app the homescreen of your device so you'll be able to see what's available, though without adding an icon for the web app into your app drawer, meaning it will only be present on the homescreen so you'll need to keep it there if you want as quick access to it as possible.
In addition to the progressive web apps coming to the browser Firefox 58 beta also now has support for FLAC audio codec files which will afford users better audio quality and should be an especially nice addition for anyone who really appreciates having the best quality sound for songs and such. This latest version of Firefox beta for Android should already be live on the Play Store for all users to get at if they're interested in giving things like the progressive web apps a try. If you've not used Firefox beta for Android before then you should still be able to get version 58 by installing the app for the first time and checking things out. One last change it seems that Mozilla has made is the removal of the Firefox search widget, so if you enjoyed using that it unfortunately looks like you have to say goodbye to it.