Luakit: A fast, extensible, and customizable web browser
luakit.github.io
luakit.github.io
If they get it to GTK 4 and recent WebKit release they'll get a lot of DMA-BUF usage to bring many of those WebKit->GTK->Compositor copies to 1 (or in some offloading cases, zero).
Oh, and sometimes there are WebKit incompatibilities[1], which means I have to hold back upgrading WebKitGTK on my system until it's fixed.
Also, if you have a Lua jit in the client and another on the server [0] who knows how far you can go? (Just need a wasm compiler I guess)