On 12 Jul 2016, at 15:43, Koen Punt wrote:

And I had the second crash within the hour just yet:

I just pushed a build that hopefully fixes that. I got a lot more crashes from beta 11.7 than I am used to, so sorry to everyone about that. It was a “last minute fix” that I pushed, which turned out to not really be a fix at all…

As for callback.document.will-save, is this failing for the active document (selected tab)? Or is it about non-active tabs?