The issue is the new webrenderer or how it is called. There are options in about:config to disable it and force the old webrenderer. Then it can runs rather fa

The issue is the new webrenderer or how it is called. There are options in about:config to disable it and force the old webrenderer. Then it can runs rather fast on X over SSH in LAN and somewhat okayish through the internet. Ten years ago I was using it all the time and it was very fast over the internet and perhaps even through Tor. I do not know how they could mess it up so badly