Howto : Upgrade from Firefox3.x to 3.5 in Linux

Firefox 3.5 has been released and is available for download, the new version is faster than ever and come with many new features.

What’s New in Firefox 3.5

Firefox3.5 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past year. Firefox 3.5 offers many changes over the previous version, supporting new web technologies, improving performance and ease of use. Some of the notable features are:

  • Available in more than 70 languages. (Get your local version!)

  • Support for the HTML5 and elements including native support for Ogg Theora encoded video and Vorbis encoded audio. (Try it here!)

  • Improved tools for controlling your private data, including a Private Browsing Mode.

  • Better web application performance using the new TraceMonkey JavaScript engine.

  • The ability to share your location with websites using Location Aware Browsing. (Try it here!)

  • Support for native JSON, and web worker threads.

  • Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.

  • Support for new web technologies such as: downloadable fonts, CSS media queries, new transformations and properties, JavaScript query selectors, HTML5 local storage and offline application storage, text, ICC profiles, and SVG transforms.


Upgrade your current firefox for Linux to firefox3.5

1- Download firefox3.5 from Firefox website

Go to /tmp

cd /tmp



2- Now close all the windows of your current firefox and untar,


tar -jxvf firefox-3.5.tar.bz2


I suppose that your firefox3.x is installed in the folder /usr/lib/firefox-3.x,

make backup of this directory first :

#cp -r /usr/lib/firefox-3.x /usr/lib/firefox-3.x.backup

remove old files with :

#rm -rf   /usr/lib/firefox-3.x/*

Now verify first where your current firefox is installed and adjust the command bellow to point the installation to this folder.

In my case /usr/lib/firefox.3.x

cp -avr firefox/* /usr/lib/firefox-3.x/
 And is done :)


  • Gen2ly

    Probably be a good idea to mention that it be best to use the distro’s package manager if available. Adding it as such will cause problems with removing and updating.

    For people that have been using firefox for awhile too, couldn’t hurt to start with a new profile too. Then you can transfer passwords, history… to it. Wrote about it-here:

  • tej.parkash

    I don’t think that this is called upgrade. It is just remove earlier firefox and replace it with new one

  • unimen

    tej.parkash :

    exactly ; is fresh going to updated version :)

  • Giorgio Sironi

    Do NOT do this. Since the firefox was installed by the package manager of your distribution, it will not track these changes and you will lose the possibility to upgrade firefox or it will be overwritten. Downloaded stuff should be kept in /opt and then you can place a symbolic link where you want. :)

  • Philip Marno

    I followed the same instruction from another website and now my firefox if foxed.
    When Start firefox I get an :

    XML XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xul
    Line Number 34, Column 1: