If you dont have a clue what it is, many of us say you shouldnt be allowto live. You can find more info over on the Mozilla website: http://www.mozilla.org/products/firefox/

The Mozilla website is a bit slow at the moment but you can get it from here:
Windows (4.7mb): http://64.12.168.21/pub/mozilla.org/firefox/releases/1.0/win32/en-US/Firefox%20Setup%201.0.exe

Mac, Linux and also localised versions for those of you who's first language isint English can be found over here

Pretty much the same tbh... just a few bug fixes and several other thigns users dont really notice. Although one odd thing is the homepage:

http://www.google.ie/firefox?client=firefox-a&rls=org.mozilla:en-US:official

Google humm? The rumours of Gbrowser based on Firefox spring to mind.

If you're not convinced to switch yet i recommend viewing stopie.com

Firefox is ace, but better with the plugins. allow me to make a small list of my fav plugins for now:

Flashgot: So you can download with getright etc. Commands like download all files on page etc
AdBlock: Fantastic plugin! Block ads etc (images AND flash (and iframes (google words)). Works also with wildcars (block all images from site or path). Greatly improves surfing experience to those sites you frequently visit.

ImageZoom: right click images and use scroll to zoom in/out

Webmailcompose: Right click on an email adress, click ze button to immediately open a compose mail page from your favorite email site to that email adress. Very handy!
BBcode : select words, right mouse click to add bbcode. Handy for those that visit a lot of fora (like me)

GMail notifier: For those with gmail
Xmirror Adds 2 more extension sites in the extension menu

All in one mouse gestures: if you want mouse gestures etc, this is your extension. By moving your right mouse button (dragging) you execute commands. This one's very good because it leaves a red trail

Tabbrowser extensions: Adds more preferences for tabbed browsing

Cutemenus: adds images for right mouse click commands. Nice

Bugmenot: Use fake registration info on sites