Mozilla announced it plans to drop support for the Mac OS X 10.4 "Tiger" operating system in future versions of the Firefox browser. The developers argue that supporting the nearly five years old operating system is a hindrance and that dropping support will enable them to significantly improve the user experience on Mac OS X 10.5 and especially 10.6.
Supporting Mac OS X 10.4 also comes with a penalty for those who are using 10.5 and 10.6, added Mozilla programmer Boris Zbarsky. "We can significantly improve the user experience on 10.5 and especially 10.6 if we drop support for 10.4 (we're talking something like 30 percent performance improvement on 10.6, for example if I recall the numbers correctly, between the newer compiler and doing 64-bit builds," he noted.
Mike Shaver, Mozilla's vice president of engineering, added that the decision wouldn't immediately cut off those with Tiger.