Mozilla.org: Firefox 1.5.0.3 Released May 3, 2006, 18 :00 UTC (0 Talkback[s]) (5755 reads)
From the Release Notes:
"Firefox 1.5.0.3 is a security update that is part of our ongoing program to provide a safe Internet experience for our customers. We recommend that all users upgrade to this latest version.
Security fix for denial of service vulnerability..."