[Read the update on June 25, 2009.]
Since Facebook decided to go all Live Feed on us, we've been smothered with quiz results that we don't give two hoots about. A few of our brethren have gone berserk on their status updates, cursing this inundation of useless information.
Ah, but we are saved!
One very awesome guy wrote Facebook Purity, a script to remove stupid quiz results and application messages from external developers. It also works on Chrome and Opera and runs on Greasemonkey, a Firefox add-on.
To use Facebook Purity with Firefox:
1. Install Greasemonkey Firefox add-on. You'll have to restart Firefox.
2. Install Facebook Purity.
Word of caution: don't install scripts that you don't trust. They can be really nasty.