What Is the FileHippo Safety Guarantee?
Thunderbird 188.8.131.52 provides stability and security enhancements that are part of our ongoing program to provide a safer email experience for our users. We recommend that all Thunderbird 1.5.0.x users upgrade to this latest version.
MFSA 2007-40 Upgraded Thunderbird 184.108.40.206 missing fix for MFSA 2007-23
MFSA 2007-29 Crashes with evidence of memory corruption (rv:220.127.116.11)