I have been reading a lot of praise about the FireFox browser from Mozilla.  You can get it here.  I downloaded the FireFox browser and I don’t get it.  From a designer standpoint (See a comment by Chris Curtis) I understand that there are features that are possible if the browser is not IE, but I have also noticed that some features that work in IE seem more difficult to design for Mozilla.  I am probably missing some very obvious and important point, but changing browsers simply to send a statement to Micro Soft is not a course I will follow.  I am going to continue using FireFox for a while to see if something positive become apparent. I do like tabbed browsing.  Quoting from their site the main features are:

Tabbed Browsing - Makes surfing the web faster

Browser window with three tabs opened.

Tabbed browsing changes the way you use the Internet by allowing you to open links on a page in background tabs and then read them when you’re ready. Tabbed Browsing makes it much easier to keep track of several pages or sites at once by letting you view them within a single browser window. It’s easy to navigate between tabs - just click on a tab to view the page. Tabs load in the background so you can browse the web faster - and stay organized. To use Tabbed Browsing, hold down Ctrl while clicking on a web link, or click with the middle mouse button.

“Open in Tabs” opens contents of Bookmarks Folder in Tabs.

Tabbed browsing makes the web faster and more efficient. You can concentrate on reading a page without the confusion of having to switch between windows. While you’re reading a page, links you have opened in background tabs are loading so when you’re ready to read them, they’ve already finished loading and you don’t need to wait.

While it seems like a simple idea, Tabbed Browsing is a revolutionary enhancement to web browsing. FireFox brings you the simplest, most intuitive version of Tabbed Browsing you will find today.
Pop-Up Blocking

This icon shows that Firefox has prevented a popups from opening.

No more annoying pop-up advertisements! Firefox effectively blocks unrequested pop-up windows while still displaying the ones you actually want to see. The pop-up blocking and simple whitelist mechanism is easy to use.

There are some sites that make use of popup windows in a good way. When Firefox blocks a popup window, you’ll see an icon in the status bar. Click on this icon to show a list of sites that Firefox stopped and then just unblock a popup window if you need.
Customizable Toolbars

Customize the toolbars just the way you want them.

The toolbars are completely customizable, allowing you to add and remove items (buttons, search field, bookmarks, etc.) to the toolbars as well as create new toolbars.

You can even move all toolbar items to one single bar, allowing you to save screenspace for the web pages you’re visiting. In addition, you can choose between small or large icons, icons with text or just text buttons. Just select View > Toolbars > Customize… and arrange Firefox the way you want it.
Extension Management

Firefox can be easliy extended.

Extensions are small programs (or plug-ins) that add new functionality to Firefox. It can be anything from a toolbar button to a completely new feature, such as mouse gestures. The great thing about extensions is that they allow Firefox to stay small and unbloated. Anyone who requires more features can download the appropriate extension. With basic knowledge of industry standards such as XML, CSS and JavaScript, you can even create your own extensions.
Better Search Features

Firefox helps you fill out web forms and remembers what you’ve searched for.

One of the most common things to do on the web is searching. This was something the Firefox developers realized when designing the browser and the result is a the best search features available in a browser today.

Right on the toolbar, there’s a Search bar making web searches even more accessible and convenient. Just hit Ctrl+K or click on the search field, enter some things to search for and press Enter. It supports “Find in this Page”, Google and dmoz.org but can easily be extended to hundreds of other search engines with the click of a link at mycroft.mozdev.org.

The Auto-Complete mechanism makes you more effective by remembering things you searched for and addresses you’ve visited. It even works for online web forms! Just start typing and it will provide you with good guesses right away.
Fast and Convenient Sidebar

The sidebar offers many conveniences not seen in other browsers.

With the Sidebar offered in Firefox, you have access to lots of useful things. By using the Bookmarks Sidebar, you can access and easily organize your bookmarks with your mouse. Just drag a bookmark to a new location and the change will be reflected in the Bookmarks menu as well. Right-click a bookmark to access even more features.

The Downloads Sidebar provides easy access to both the files you are currently downloading as well as a list of recent downloads. Right-click a downloaded file and select Show and Firefox will take you to the folder where you downloaded the file. Double-click the file to launch it directly.

By using the History Sidebar, you can easily navigate back to sites and pages you have previously visited. The links are sorted by the day they were visited which gives you a good overview of them. Searching for a specific page? Just enter some words in the Find: field and press Enter!