fixed build with changed install directories (defaults/pref -> defaults/preferences)
enabled GStreamer support on 12.1 and newer
made toolkit packaging errors non-fatal (as they are expected with system NSPR and NSS anyway)
[Desktop Entry]
Encoding=UTF-8
Name=Firefox
GenericName=Web Browser
Comment=Web Browser
TryExec=firefox
Exec=firefox %u
Icon=firefox
Terminal=false
StartupNotify=true
MimeType=text/html;text/xml;application/xhtml+xml;application/vnd.mozilla.xul+xml;text/mml;application/x-xpinstall;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/ftp;
Type=Application