Based on Mozac 73.0.11 and GeckoView Nightly 88

Release 4.0 beta

+ Fixed issue where dropdowns and file uploads would work incorrectly
+ Fixed broken toolbar actions
+ Improved theme system (please note, your current theme setting will be lost, and the app will default to 'Follow System' for both web and app theme)
+ Add-ons can now detect what theme the browser is using
+ Fixed issue where dropdowns and file uploads would work incorrectly
+ Updated Android components

Unsure which file to download? If your device is recent, get the arm64 variant, or otherwise get the armeabi-v7a variant.