Do you still use Firefox? I am still a Firefox fan, however the latest release in the Dev channel for Google Chrome has me really excited. One of the best extensions for Firefox was one called NoScript -- a really easy way to make sure browsing stays secure.
At first, this feature feels like Windows Vista -- asking you if you want to allow scripts every time you click on something -- but it doesn't take long for your exemption list to become fairly robust.
You can also control your content settings from the address bar. If there is any blocked item on the current web page, a small icon will appear in the address bar, and users can manage settings by clicking on it. This feature is similar to NoScript, where you can control settings from the status bar icon. -- <a href="">Techie Buzz
Google Chrome is almost irresistible now -- I can't think of any reason, other than Firebug, why I should use Firefox anymore. Can you think of anything Google Chrome doesn't do well enough to switch from your current browser?