https://bugs.winehq.org/show_bug.cgi?id=51442
--- Comment #18 from Zebediah Figura z.figura12@gmail.com --- The Firefox hang appears to be due to stack corruption, from passing a fd_set that is larger than FD_SETSIZE. Since I don't see any such symptoms in the log from comment 10, I'm going to assume that it's a different bug, and I've filed bug 52302 accordingly.