Although other browsers like Google Chrome gets more and more users, Mozilla Firefox is still most users' priority. In the latest Firefox 4 you will find that Firefox launch faster, pages load quicker, web apps and games work better, and the interaction with your favorite website will be snappier. It comes with a new interface, manageable group tabs, synchronized settings, new add-ons manager, high-definition video capability and multi-touch support. Plus with Panorama, privacy protection, crash protection, Firefox 4 will bring a much better and secure web browsing experience.

Among web browsing experiences, video enjoyment is one of the most popular entertainment. There's a ton of great content on YouTube and other video Web sites, but if you're not connected to the Internet, it's inaccessible. Below it recommends three ways to download YouTube videos under Firefox 4. Hope it is useful for all of Firefox users and web video fans.

Install Firefox Add-on to Download YouTube Video

One of the advantages of Mozilla Firefox is that it has a lot of excellent add-ons for almost all online needs, including downloading video or music in the page you opened. There are more than thirty YouTube downloader add-ons and among those extensions, Free YouTube Downloader from SothinkMedia is the first one that upgrades to be compatible with the latest Firefox 4 Beta.

Free YouTube Downloader, formally named as Sothink Web Video Downloader for Firefox, is a pretty straight forward program and very easy to use. Just install the extension, run it together with Firefox 4, and let it automatically download videos in the web page you are viewing with Firefox 4.

Free YouTube Downloader installs easily and appears as an icon to the left of Firefox 4's address bar. The icon will turn to be colored and animated from gray when it detects some video. Downloading a video is as simple as clicking the button, selecting the destination location, and clicking OK. The extension then opens a new Web page that shows a progress bar depicting how much of the file has been downloaded. Free YouTube Downloader not only can capture and download YouTube FLV videos, but also can handle AVI, MP4, WMV, RM, RMVB, 3GP, MOV, MKV, and even H.264 HD video, Flash animation SWF and music MP3.

It also can automatically store history of downloaded and captured media files, comes with an optional FLV player, a nice touch since most media players can't play FLV files and it is with many more features. In one word, this free Firefox 4 video downloader add-on is user-friendly, excellent and it is a good reason for you to give a try even if you are not a Firefox user.

Use Stand-alone YouTube Downloader Software to Download YouTube

Not like add-ons, stand-alone software won't make you worried about the compatibility with different versions of Mozilla Firefox. Install Orbit Downloader or Sothink Web Video Downloader, which two are both popular and powerful stand-alone YouTube downloader software, and download YouTube under Firefox 4.

If you choose Orbit Downloader, you just right-click a video online and choose Download from your context menu or directly enter the URL of the video you would like to download, then Orbit Downloader can soon download it for you, no matter what the media file is or where it is from. The downloading process is same as most video downloader, but Orbit Downloader really offers a faster speed.

Besides video downloading, the buttons on the interface and dialogs in the program show Orbit Downloader has much more functions focusing on downloading management, like tagging, Metalink download, and process configuration.

Different from Orbit Downloader or any other video downloader, downloading YouTube videos with the YouTube downloader from Sothink does not need users to enter the video URL, which is not easy to get for most people. Just open a webpage, such as YouTube page, this video downloader will automatically monitor and capture the video in this page, and then it pops up a small window asking if you want to download what you are watching at the time. That's very convenient.

By now, the wonderful capturing function of Sothink Web Video Downloader is available for all version of Mozilla Firefox, including the latest Firefox 4, of course. It also supports other popular browsers like IE, Opera, and Maxthon. And it is said that in the next version, this video downloader will support capturing and downloading videos under Google Chrome, too.

Another impressive function is Sothink Web Video Downloader can directly download videos in any format on users' demand. That is to say, if you are viewing a FLV video online, and you would like to save it on your PC in AVI format, this YouTube downloader can easily realize that with only one click. In fact, this YouTube downloader is also could be considered as YouTube converter since it provides users with plenty of YouTube FLV video converting profiles to help users download YouTube and other videos in different formats and devices. The supported target formats are video FLV, AVI, MP4, WMV, H.264/AVC, MOV, MPG, MKV, 3GP, 3G2, F4V, SWF, and audio MP3, M4A, while the supported devices contain iPod, iPhone, iPad, Apple TV, PSP, Zune, PS3, Xbox 360, Wii, HTC, Blackberry, Nokia, Google Android, iRiver, Creative Zen, and more.

Go to Video Downloading Website to Download YouTube Video Online
If you do not want to install any Firefox add-on or stand-alone video downloader software, you may find some video downloading website to download YouTube video online. Keepvid.com is just one of video downloading sites.

Downloading videos online always needs you to type the URL address of your target YouTube video, which is not that convenient to get. And except YouTube video, much more web videos won't display their URLs.