Recently i downloaded Swiftfox, which is an optimized build of Mozilla Firefox. Besides some configuration tweaks, which can be done in firefox too via about:config interface, it's compiled with better optimization (-O3) then ordinary firefox build, plus binaries available for different types of processors. E.g. i downloaded for Athlon 64.
The problem i encounter is that sound no longer work in swiftsoft. I use KDE and runing it's native soundserver Artsd, but Swiftsoft is not aware of this ofcourse. In Debian/Ubuntu it is possible to specify your sound system in /etc/firefox/firefoxrc or in ${HOME}/.mozilla/firefox/rc. But ${SWIFTFOX_DIR}/swiftfox shell-script is not aware of this. So it is possible to rewrite it according to the script in Debian/Ubuntu's distribution of firefow, or use some faster way:
# ${SWIFTFOX_DIR}/run-mozilla.sh
#
[...]
#in moz_run_program(), line 166, approx.
/usr/bin/artsdsp "$prog" ${1+"$@"}
exitcode=$?
[...]
So, all that needs to be done is to substitute
"$prog" ${1+"$@"}
with
/usr/bin/artsdsp "$prog" ${1+"$@"}
