Install Firefox OS apps on Android
1. To install Firefox OS apps on Android phone, you need to install the latest version of Firefox for Android (ver. 29) browser.
2.After installing Firefox for Android, go to phone Settings -> Security and enable “Unknown Sources”.
3. Now, go to Firefox Market place, choose an app and install it.
4. You can uninstall these apps just like any other APK apps. To do so, go to Settings -> Apps, select the app, and uninstall it.
It is said that web apps are less than optimized, so their performance on your Android phone may not be up to the mark. However, interested users try these web apps and leave your views in the comment section below. (source)