With Obtanium you can add the URL (https://github.com/jqssun/android-helium-browser) and it will automatically notify when a new version is available. Kind of like a package manager for GitHub and other sources (for stuff not available on F-Droid).
Quetta is unusable for me from how much they redesign the UI for no real reason. What I wanted was just an up-to-date version of Kiwi Browser which this project seems to aim for.