One of its favorite features is tabbed browsing. Tabbed browsing allows you to view more than one page in the same window. You can easily switch between sites in an organized way. With just one click, one can open all sites contained in a folder into tabs in a single window.
You can also open links into background tabs. This allows you to finish reading your current site while your other sites load in the background; no waiting is involved.
Firefox is a web developer's best friend. Not only is it a standards compliant browser (meaning it follows the coding rules and gives predictable results) but there are extensions you can download to validate code such as XHTML and CSS. One of the best features of Firefox would have to be its user-friendliness; it's simple, clean and intuitive. Anyone can use it; it's as familiar as IE and as safe and fast as Netscape and Mozilla, its close cousins. At the same time, by customizing Firefox with useful extensions and buttons, advance users can use a fully featured and powerful browser.
Last, but not least, Firefox is small (only 4.7MB for Windows, compared to 80MB to download MIE6) and is easy to install and setup. It will only take minutes over a slow connection and seconds over a fast connection. After installation, one can optionally import settings from IE such as favorites, history and saved passwords. Basically, one can continue where they left off when they were surfing in IE.
Yes, Firefox is a great modern browser but it's not perfect. There are still many things that can be improved upon. Luckily, due to its open source nature, changes and improvements are made rather fast. One true downside to Firefox, however, is that some sites are designed specifically for IE and is not guaranteed to work on other browsers. For this reason, IE should still be kept around in case Firefox can't view a site properly. Luckily, Firefox does have an extension that allows you to view links or pages in IE.
Firefox is today's hot new browser that has gotten everyone talking. Unless IE gets their act together fast, they will continue to lose their users over to Firefox. The once dominated IE has now become the unreliable, unsafe and buggy web browser. Internet users want an easy to use, secure, fast browser and Firefox delivers just that.