Neocities.org
I'm in another one of those moments...Should I use Pale Moon or Firefox? I had Pale Moon freeze for a solid five seconds trying to load an Imgur gallery just now, but Firefox doesn't have a tabs-on-bottom feature :(
If its compatible with your system you can try Arctic Fox, Pale Moon but with the bugs worked out.
i believe you can do tabs on bottom with a custom CSS style for firefox, no?