This bug was filed from the Socorro interface and is report bp-19ee6285-3c60-4de8-b1e6-2ad2b2150705. =============================================================
A sampling of the reports seems to indicate that this may be another variation of bug 1177421. The mozglue involvement is interesting, though.
Looks related to, or a duplicate of bug 1194923
Don't see any crashes since 39.