Yeah, in practice I always run this in its own tab, so it's not a thing that has ever bothered me. I put that in because it did bother me that I couldn't Cmd-(L+C) to get a paste-able URL to show other people. In the long run, I might change it to have a time-out, maybe use `history.pushState` where available to make cleaner-looking URLs? It's not high on the priority list, though. Ultimately it's just about making a tool that does exactly what I want it to do - if it works for other people, they're welcome to use it, if not, there are only 500 million other sites that do almost the same thing, but with a slightly different take on it.