These chips aren’t going to be running browsers in the near future, unless you mean in a TV (one of the last places you could find MIPS).

The market they are headed for is embedded, where every cent of the BOM counts. Licensing costs can add up surprisingly fast as part of that.

Server parts are a big step above that - MIPS used to play there, but after a short peak they failed many times over. It tried in the networking and embedded space for a while, but then had its lunch stolen by all the cheap ARM vendors from below, and stomped on by x86 from above.

And then desktop/laptop parts? Unless you are Apple (and even then), pushing a new arch on the desktop is a massive, expensive task, and I can’t see it being worthwhile.