Lexor: What do you mean by "dead"? Last version with security fixes was released just a few days ago.
Oops. My mistake, I confused it with Cyberfox.
So, Cyberfox is dead, Waterfox is not.
It's hard times for all Firefox forks now, but Palemoon is more independent, MHO.
Have own layout engine, etc. Palemoon won't give up so fast and have some chances to survive in this new Quantum world..
Waterfox is not so unique, "Firefox 56 with telemetry off", as some people say.
I's not, but it will became Quantum (with Servo or Rust) someday or will be dead, MHO.
On the contrary, I've read some not optimistic opinions about Pale Moon you mentioned, like it is based on a very old Firefox code and this makes security patches harder.
It have very custom engine, MHO. Very classic look, but even UI is not based on Austalis (pre-Quantum UI).
I think these rumors are due to the classic interface.
It not a best solution if you need netflix, youtube, Full-HD streaming, webRTC, etc. (high CPU usage or not supported)
But Waterfox is not much better for that too. If you use software like steamlink, VLC, etc it is not a such big problem.
Palemoon also is buggy a bit, especially his UI. But, in the last revisions it was fixed. It seems to be stable now
You mean that I can somehow download them all as one file?
Yes, but I can't find this addon anymore. =(
You can download legaty extensions on github:
_https://github.com/TarekJor/Firefox-52-ESR-legacy-addon/tree/master/xpi
Palemoon and Basilisk have xpi version check disabled for Firefox addons, so they can be installed.