http://bugs.winehq.org/show_bug.cgi?id=35236
--- Comment #2 from Austin English austinenglish@gmail.com --- (In reply to comment #1)
Hello folks,
it seems this affects many applications. Any Windows version of Firefox also refuses to start now, stating "Couldn't load XPCOM".
Refining summary.
Regards
Firefox 24 works in wine-1.7.9-68-gb8e9bbd now.