HJ Hornbeck presents his solution to eliminating fireflies in renders with a variation of Greg Zaal's progressive render approach.
Hello, all! For a recent project of mine, I wound up reinventing Greg Zaal's progressive render plugin.... only, without the plugin! It's actually a wrapper script that gives you the same effect, but adds a few extra options while leaving the .blend file and Blender itself untouched. I've appended the full thing to the end of a long post that links to every other firefly removal technique I could get my dirty paws on. Hopefully someone else can put it to work, too!