Release Note:
http://en-us.www.mozilla.com/en-US/firefox/2.0/releasenotes/
Requires a libc0.5.1 based version of the GCC runtime library.
http://www.innotek.de/products/gccos2/download/gccos2download_e.html
More info at:
http://developer.mozilla.org/devnews/
Source: OS2.jp