Gran Paradiso Alpha 1 is an early developer milestone for the next major version of Firefox that is being built on top
of the next generation of Mozilla's layout engine, Gecko 1.9. Gran Paradiso Alpha 1 is being made available for testing
purposes only, and is intended for web application developers and our testing community. Current users of Mozilla
Firefox should not use Gran Paradiso Alpha 1.
What is new in Firefox 3.0 ?
If you want to know what is new in Firefox 2 check here
Installing Firefox3.0a1 in ubuntu
Preparing your system
sudo apt-get install libstdc++5
Now you need to take backup of your old firefox prferences
sudo cp -R ~/.mozilla ~/.mozillabackup
Now you need to download firefox 3.0a1 from Mozilla site
wget -c http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/firefox-3.0a1.en-US.linux-i686.tar.bz2
Unzip the .tar.bz2 file in /opt directory using the following command
sudo tar -C /opt -jxvf firefox-3.0a1.en-US.linux-i686.tar.bz2
Now you need to link the plugins using the following command
sudo ln -s /usr/lib/mozilla-firefox/plugins/* .
Now you need to create a link to your new firefox launcher using the following command
sudo dpkg-divert --divert /usr/bin/firefox.ubuntu --rename /usr/bin/firefox
sudo ln -s /opt/firefox/firefox /usr/bin/firefox
sudo dpkg-divert --divert /usr/bin/mozilla-firefox.ubuntu --rename /usr/bin/mozilla-firefox
sudo ln -s /opt/firefox/firefox /usr/bin/mozilla-firefox
This will complete the installation of firefox 3.0a1
You can see in the following screen firefox 3.0a1 in action
If you want Firefox3.0a1 addons list check here
If you want to troubleshoot any problem with firefox3.0a1 check here
For debian users they can run the above commands without sudo it should work without any problem.