So you’re one of the 8 million people who downloaded Firefox 3 yesterday. What next? Here are some links to get you started..
Uses PDFKit to display PDFs in the browser.
firefox-mac-pdf
Lifehacker - Power User’s Guide to Firefox 3
MultiFirefox 2.0 | Code Contortionist
Run Firefox 2.0 alongside Firefox 3.0 for webdev testing purposes.
Firebug
Firebug integrates with Firefox to put [...]

Mozilla Firefox 3 is available for download! Having used the release candidates for the past weeks, I’m pretty excited with the new version.
Top New Features:

One-Click Bookmarking - Bookmark, search and organize Web sites quickly and easily.
Instant Web Site ID - Avoid online scams, unsafe transactions and forgeries with simple site identity.
Improved Performance - View Web [...]

On a Mac, I primarily use Camino as my default browser as it is really quick and it doesn’t hog the system. Firefox 3 is still in the works but I decided to use it and see if it’s more stable than version 2. Here’s a screen cast explaining the new features in Firefox 3 [...]