re: #20 Walter L. Newton

Can I have it too?

Sure, it uses the Greasemonkey add-on for firefox as its runtime. Adds three commands to the “User Actions” submenu (found under the “Greasemonkey” menu, screenshot here). Scrubs threads clean on load and when the “new comments” button is used.

Can be installed from here

No warranty is implied, this product is not fit for any purpose, the author is not responsible for any resulting usage. All code is released to the public domain.