Seamonkey 2.0.10, Firefox 3.6.12, and Thunderbird 3.1.6 were all quickly
released a few days ago to patch some security bugs; hopefully we will
see the OS/2 versions soon. Firefox 4.0 beta 7 should be released
within the week or two, although the final release has been pushed back to early 2011, after a few more beta releases. SeaMonkey 2.1 will also be pushed back to at least the same release time frame.
Source: OS/2 Warp News and Rumors