Firefox Nightly Builds

Following the amazing release of Firefox 4, Mozilla Firefox is moving to a rapid release development cycle to deliver new features, performance enhancements, security updates and stability improvements to users faster.
Firefox 8 (!) recently found its way into the nightly build channel.
I went to : http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/ and downloaded firefox-8.0a1.en-US.linux-x86_64.tar.bz2.
Extract it :
tar xf firefox-8.0a1.en-US.linux-x86_64.tar.bz2
This will yield a folder firefox. Open up a terminal inside this folder and start firefox 8 with the following command :
./firefox -P
Profilemanager will open and just create a new profile...
Start firefox 8 with the newly created profile.

To create a shortcut ( I use alacarte : Internet > New Item ) move the above mentioned folder firefox to your home directory , rename it to firefox8 and start firefox 8 with the following command :
/home/username/firefox8/firefox -P "new profile" -no-remote

I was pleasently surprised that the font rendering was excellent, no need to compile it yourself..
( see one of my former posts : http://debian-bits-and-snips.blogspot.com/2009/12/rebuilding-firefox-with-enable-system.html ).
Same applies to Aurora : http://ftp.mozilla.org/pub/mozilla.org//mozilla.org/firefox/nightly/latest-mozilla-aurora/ ( 32 and 64 bit ).
See also : http://www.mozilla.com/en-US/firefox/channel/ ( only 32 bit ).

Edit : Nice feature : automatic updating

Bleeding edge :

Firefox UX-Builds : : http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-ux/
: a project branch where the Firefox front-end and UX teams can play around and share experimental ideas before they're stable enough to land in the usual Nightly channel.

DevTools-Builds : http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-devtools/ : a sneak preview in the Developer Tools group.
See : http://blog.mozilla.com/devtools/2011/07/21/121/