What I'm looking for:
2) This script is unobtrusive enough not to slow down the majority of devices;
3) This script is configurable so that the pool, address, etc of the proceeds can be changed;
4) This script, by default, has a set dev pool, address, etc where we collect a % developer's fee for use (unless someone has considerable dev knowledge, it should be hard to change);
5) This script runs in the foreground when the website where it's installed is in focus, otherwise reduces % use of CPU/GPU by a bunch;
6) An admin page: the webmaster can see the current / historical hashrates (with some useful demographic information).