Jun 232011

Mozilla Firefox is one of the earliest popular alternative browser to Internet Explorer and I have been using Firefox browser since it’s in version 2.0. Just in 3 months time after Firefox 4, the newest version Firefox 5 is released now and there are some great improvements and new features were added in terms of speed, security and performance.

firefox 5 browser

Let’s learn what’s new in Firefox 5 now:

1)      Added support for CSS animations

2)      The Do-Not-Track header preference has been moved to increase discoverability

3)      Improved canvas, JavaScript, memory, and networking performance

4)      Improved standards support for HTML5, XHR, MathML, SMIL, and canvas

5)      Improved spell checking for some locales

6)      Improved desktop environment integration for Linux users

7)      Background tabs have setTimeout and setInterval clamped to 1000ms to improve performance

Now, watch the short video to get an overview what makes Mozilla Firefox so great and explore its popular features.

How well is Firefox 5 Compares to Firefox 4?

Better Speed and Less Memory Resource

Although there are not many changes on user interface but the most outstanding improvement is its speed. We know that Firefox 4 is a bit slower and utilizes lots of memory resource. In my previous Firefox 4.0.1, the memory usage was over 300MB but using the new Firefox 5, it uses less than 300 MB of memory. In terms of browsing speed, Firefox 5 is quick and faster than previous version. It has a fast JavaScript engine and much improved HTML5 support compared to Firefox 4.

Below screenshot shows the HTML5 test results for some popular browsers and Google Chrome takes the lead while Firefox 5 is sitting on the second with 286 scores.

firefox 5 html5 test score

Easy to Enable Do Not Track Feature

Do Not Track feature is being used to stop third-party tracking for behavioral advertising and it’s now easy to find on Firefox 5. Just go to Firefox Options >> Privacy >> Tracking (tick Tell web sites I do not want to be tracked).

firefox 5 do not track feature

Previously in Firefox 4, you need to go deeper to enable this feature. (Firefox Options >> Advanced >> General >> Browsing (tick Tell web sites I do not want to be tracked)

firefox 4 do not track option

According to Mozilla official blog, Mozilla Firefox 5.0 is also the first web browser to support Do Not Track on multiple platforms including Firefox for Android.

firefox option for android

How to Upgrade Firefox for Windows, Mac and Linux

Just go under the “About Firefox” menu, click on “check for update” to auto upgrade to the latest version Firefox 5.0. Otherwise, you may download Firefox 5.0 installer from Firefox.com. For Android users, you can download the latest version of Firefox for Android from Android Market.

firefox check for updates


Firefox 5 is a must-installed web browser for internet users. I was impressed with its significant speed improvement and better security enhancement. Therefore, I can expect Firefox 5 will be a huge rival to other popular browsers such as Google Chrome, IE9, Opera and Safari.

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