I think there’s an interesting clue in the fact that the entire 9front has less lines of code than Go, which this browser depends on. And that includes two web browsers already shipped with the system! Yes, there are ways to force Plan 9 into something it isn’t, but fundamentally starting from the assumption that you want it replace your daily driver is not going to work out.

If you’re interested in it, set it up on a Raspberry Pi, connect to it with drawterm from your daily driver. Experiment with adding a second machine, netbooting it as a CPU server etc. That way you’ll look at Plan 9 from the point of its strengths, not weaknesses.