The best browser for the Mac, Camino, has gotten even better with the release of Camino 1.6. I know what some of you are thinking, 'How can you say that Camino is the best browser for the Mac? It doesn't support extensions, it isn't made by Apple, and it won't buy me a pony!'All of those things are true (though I'm still hopeful that I'll get a Camino pony in the mail any day now), but for my money no other browser on the Mac feels more like an OS X app than Camino does (your opinion may vary, and I'm sure you'll let me know why I'm wrong in the comments). New in Camino 1.6 are a host of UI changes that make the browser much nicer to look at, as well as improvements in navigating tabs, and a search interface more like Safari's (though Safari's highlighting of search terms within webpages still bests Camino's).
Camino 1.6 is available now, and is free and open source.
The Surfin' Safari blog dedicated to the open source WebKit project (which powers Safari on Mac OS X, Windows and even the iPhone) has announced the availability of 
A browser doesn't seem like it should have that adverse of an effect on one's system performance. Aside from the power users who surf for hours at a time and leave their browser running for days on end, one's browser shouldn't be dragging the rest of the class down.
I know Adium can insert links from some browsers by itself, but I just found a script at the 
HistoryHound is a handy search utility for anyone who does a lot of surfing and RSS reading between multiple apps. It offers a full text search of most of the major Mac OS X browsers including Mozilla's, OmniWeb and even Opera, as well as two of the more popular RSS readers: Pulp Fiction and NetNewsWire 2. It can be called with a keyboard shortcut, or a small search panel can be left to float above other windows, always waiting to do your bidding.
*Oh snap!* Agile Web Solutions has created a password and form manager extension for both Safari and Firefox that fixes one of my biggest gripes about Mozilla's flagship browser: it can store website passwords in Mac OS X's Keychain Access application. For those who haven't stumbled upon the wonders of the Keychain: it's a system-wide secure password manager that most other Mac OS X apps can use to store logins for things like websites and FTP access. 
Firefox,
inarguably, is one of the coolest browsers available and a necessity if you're using Windows. On OS X however, I've
been on the fence during Firefox's existence as there are a number of ways that Firefox and Mozilla have gone wrong and
ruined the browser's user experience.
