I definitely do not recommend using Firebird for any actual work, since it’s still in pre-release, and stability is obviously not guaranteed. I recommend MSIE for anything work-related, and switch to Firebird for casual browsing.
Personally, that’s garbage. I’ve been using Firebird exclusively for months, switching to IE only for Web site compatibility testing. I have yet to have a problem. (The same, however, cannot be said of Firebird’s email client cousin, Thunderbird. That app is still a little rough around the edges.)