product=${product:-firefox}
branch=${branch:-1.9.0}
buildtype=${buildtype:-opt}
profilename=${profilename:-firefox-1.9.0-jprof-profile}
profiledirectory=${profiledirectory:-/tmp/firefox-1.9.0-jprof-profile}
executablepath=${executablepath:-/work/mozilla/builds/1.9.0-jprof/mozilla/firefox-opt/dist}
userpreferences=${userpreferences:-/work/mozilla/builds/hg.mozilla.org/mozilla-central-test/testing/sisyphus/prefs/test-user.js}
extensiondir=${extensiondir:-/work/mozilla/builds/hg.mozilla.org/mozilla-central-test/testing/sisyphus/xpi}