Random crashes with TBB on OS X 10.9

I usually leave my Tor Browser w/tabs open for long periods of time. After a week or so, the browser crashes. Before 3.5-rc-1, I would get a warning message saying Tor Browser had crashed and an option to relaunch it. With 3.5-rc-1, the Tor Browser seems to relaunch on its own (all I see is a Tor Browser with zero extra tabs displaying about:tor).

I suspect this is more related to Firefox on OS X than Tor itself, but figured I'd open a ticket anyways.