The Daily Twit

• 10:06 Four triple loads and four double loads. took more than $20 just to start the washing machines! that's what finally my first paycheck lo ... #
• 10:09 Fortunately, I arrived early enough to have my pick of the machines. the bright side of being woken by creditors who claim they haven't ... #
• 14:29 Going to brick store for late lunch. Wonder if i'll run into anyone. #

Text-replacing addon for Firefox?

I'm looking for an add-on that would allow me to say "Replace all occurrences of 'wilw' with 'wilw [Wil Wheaton]' on sites matching 'twitter.com'" and "Replace all occurrences of 'distinctusernameIforgot' with 'distinctusernameIforgot [Real Name]' on all sites". It would replace the text after the page had loaded.

Anyone know of such a thing?