Just watched a video and they said something interesting.
The best browser currently in my opinion would NEVER be Firefox even compared to other browsers that aren't held in high regards (I care a lot about customization and privacy by default).
That can be remedied, and in fact, make it the BEST, by searching and implementing user.js files from GitHub and such (but that's too much work), I wonder... is there a better solution?
Look and judge yourself, this is the website recommended in the video as a simple way to solve Firefox's issues, and make it great.
Here's the link: https://ffprofile.com/
By the way, Waterfox's customization is PEAK so if there is some way to make these two work together that would be... let's just say, good.
Also, colors are good and pretty and cool, didn't know about those.