Complext Text Layout (CTL) support configuration

I had a issue of not able to see the complex script (CTL) fonts like my mother tongue, Tamil in Firefox (It works with Konqueror). Complex script can be enabled in firefox with the help of pango library. Although libpango has installed, by default this library is disabled in firefox configuration. The workaround is just adding "MOZ_ENABLE_PANGO=1" in /etc/mozilla-firefox/mozilla-firefoxrc file. Then I restarted the firefox. Then I could see the complex script fonts like indian fonts properly.