This install should not harm your existing Firefox installation. This basically walks you through the official Firefox installer and is mainly for the benefit of people who are worried that it might harm their system or that they might do it incorrectly and overwrite their existing Firefox version.
Backup your firefox profile, just in case the new version corrupts it (nothing bad happened to my profile).
Now install Firefox 1.1 Alpha 1.
$ cd ~/.mozilla
$ tar -cMf firefox.tar firefox/
Installer wizard (custom install):
$ wget ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/deerpark/alpha1/linux-i686/en-US/deerpark-alpha1.installer.tar.gz
$ tar -zxf deerpark-alpha1.installer.tar.gz
$ sudo firefox-installer/firefox-installer
1. Click Forward
2. Click Accept
3. Select Custom for install type
4. Click Forward
5. Click "Yes" to create the directory
6. Select any components you want to install.
7. Click Forward.
8. Click Install.
Run Firefox 1.1
Use the above executable when making a shortcut. Do *not* use the firefox-bin executable.