Wow, that's possibly the most biased article I've read here without a certain hack with the initials A.O. being involved... Seriously, it's the first time this record attempt has been made, and every record has to be performed for the first time. Guinness will have had to approve the method it's recorded by in order to be accepted into the book, which it was. What's the problem with that exactly?
...and what the hell's up with the usual fools above complaining about pointless stuff? Don't like the new address bar? Type "turn off firefox 3 location bar" in Google and follow the idiot-proof instructions (293,000 results ATM).
Can't live without certain extensions? Look the see if their authors have bothered updating them before updating Firefox. Yes, that's right *the authors of the extension*, which Mozilla aren't responsible for creating or maintaining.
I'm happy with FF3 so far, like the location bar, love the new layouts for the addons and I like the new look. I have 5 installs of it so far, and only one of them counted toward the record so I'm sure a lot more than 8 million are using it.