Waterfox

Stay away. Waterfox has been bought by advertising and data analytics firm System1.

Waterfox has now been bought out by an ad company, System1. It was nice while it lasted, using my old Firefox plugins. Gonna have to find an alternative now, probably.

From the release 41 Firefox will start blocking unsigned extensions.
Waterfox will keep the possibility to install them, another reason to prefer this software to the original one.

Best Firefox-fork out there, no telemetry & faster than Mozilla's browser.

As I find Firefox more and more intrusive and Chrome-like, I installed Waterfox some months after trying Palemoon and at the moment I keep Firefox Quantum and Waterfox on my PC (Palemoon is very good but what about not being able to install so usefull add-on like uBlock origin ? )
With Watefox, I had to reinstall the add-ons I have in Firefox, each time fetching an"older version" to be compatible, but these these versions were not so old.

What I dislike in Firefox is that it seems more and more to run after Chrome.
I really don't like the Options menu in Firefox. Sometimes your may ask yourself in wich part of the menu you are, because there is no really landmark on this entirely white screen. I imagine that the main purpose of this non-ending screen is to dissuade people to modify the options (for example blocking all third party cookies, uncheck sending reports to Mozilla, disabling Web push completely and so on).
Perhaps within some time I will keep only Waterfox.