I actually just did that myself a while back — I was looking for a 64-bit browser and Pale Moon looked like the best choice.
64-bit browser and Pale Moon>>>>>>
I tried 64 bit WaterFox. It chewed up too much memory going by what I saw in task manager. So I went back to Firefox. Or is it called FireFag these days?
Upfront I’ll tell ya’s, I liked Firefox. I had it kitted out with all the right (for me) add-ons and stuff.
What it looks like is that all of those additional things integrate pretty seamless into the Pale Moon browser.
Kinds weird, but in a good way.