Linked by Thom Holwerda on Wed 20th Oct 2010 22:22 UTC, submitted by vivainio

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Member since:
2007-02-17
This was true for one release, but only because the Windows build only had been optimized via a process called profile guided optimization.
http://en.wikipedia.org/wiki/Profile-guided_optimization
This optimization wasn't done by Mozilla for the Linux build they distributed. At least a few distributions, SuSe I think was one, did however do it for the build they distributed. SuSe also made patches for Firefox to give it better integration with KDE, even to the extent of using native KDE dialog boxes.
I think Arch may have picked up on SuSe's work:
http://aur.archlinux.org/packages.php?ID=22296
It is not the primary design of an application that makes it fast or slow under one OS or another, it is the little details of how it is tuned and built that matter.