Mozilla has just released Firefox 20.0 and this brief tutorial is going to show you how to upgrade in Windows, Mac OSX or Ubuntu systems. This release brings some new features like, opening a private browsing session without the need to close the entire browser, a new download manager for the desktop version, the ability to close hanging plugins without affecting the browser and support for HTML5 and WebRTC.

Besides the new features, there were some bug fixes related to security and stability. Below are some of the feature that were added in this release.

  • Memory corruption while rendering grayscale PNG images
  • WebGL crash with Mesa graphics driver on Linux
  • Per-window Private Browsing
  • New download experience
  • Continued performance improvements around common browser tasks
  • New JavaScript Profiler tool

For a complete changelog on this release, please visit Firefox’s release notes page.

To easily upgrade in Windows or Mac OSX systems, open Firefox and select Firefox Button –> Help –> About Firefox




Firefox will automatically download and update itself. When done, click the ‘Restart to Update’ button to complete.




That’s it!


To upgrade in Ubuntu, press Ctrl – Alt – T on your keyboard to open the terminal. When it opens, run the commands below to add its security PPA.

sudo add-apt-repository ppa:ubuntu-mozilla-security/ppa


Finally, run the commands below to update your system and upgrade Firefox

sudo apt-get update && sudo apt-get dist-upgrade