Yes, it's pretty much undoable. You'd have to compile webkit for Plan 9, which requires a C++ compiler, which Plan 9 doesn't have. There are some gcc ports, but

Yes, it's pretty much undoable. You'd have to compile webkit for Plan 9, which requires a C++ compiler, which Plan 9 doesn't have. There are some gcc ports, but I don't know how well they work. There are also probably a ton of dependencies. So a modern webbrowser is not really feasible.