#filter substitution {972ce4c6-7e08-4474-a285-3208198ce6fd} 2.0 {3550f703-e582-4d05-9a08-453d09bdfdc6} @THUNDERBIRD_VERSION@ @THUNDERBIRD_VERSION@ Thunderbird (default) The default theme true true #ifdef XP_MACOSX Kevin Gerich and Stephen Horlander #else Arvid Axelsson #endif Mozilla Contributors classic/1.0