Today Mozilla has released three major updates (postponed from December 14th): Firefox 1.5.0.9, likely to be the last release on the 1.5 builds. Remember, all support for the 1.5 builds will end on April 24, 2007. Firefox 2.0.0.1, 183 bug fixes including (but not limited too): Crashes (42), Memory Leaks (3), Regressions (41) and Privacy Related (4). Thunderbird 1.5.0.9, 7 bug fixes* including: Build Configuration (2), Functionality (2), Spellchecker (1), Mac-specific (1) and Miscellaneous (1) Auto-updates should start kicking in later this evening. If you want to update sooner visit getfirefox.com (note: at time of press, Mozilla has not yet…