Firefox Extensions:

Scribe Fire:
https://addons.mozilla.org/en-US/firefox/addon/1730
Allows you to manage your blogs from firefox without all that messy wp-admin stuff. Also has some monetizing options I have not looked into

Update Scanner:
http://updatescanner.mozdev.org/en/index.html
Scans pages you visit frequently for changes. Keep an eye on the competition, or just on the price of an items you’re looking at, or anything else you can imagine.