Hi,
I like Palemoon too but I know the Linux Lite team tries to stay away from apps installable in PPAs because of problems in the past.
I would add though that I have not had any issues with it (the software and updates) for more than a year now and also run it on low-ressource systems.
I only open 2-3 pages at a time to limit memory usage.
It's based on a previous Firefox/Mozilla build (before Quantum) for those interested, so legacy Firefox add-ons work on it.