Re:EULA is quite important (Score 1)

No, the feature is on by default. The Firefox 3 anti-phishing system works quite different to the Firefox 2 one. Here's how it works:

1) Google sends and updates Firefox with a database of partial hashes.
2) If Firefox hits on one of these partial hashes with a website it queries Google for the full hash.
3) Firefox sends 4 other partial hashes out of the database so Google can't tell what websites specifically are being viewed.
4) Firefox takes the full hash and checks it against the website.
5) If it doesn't match: load website. If it does match: block website.