I've been seeing this for a few weeks now. It seems that every single time I start Firefox, it crashes. Then I start it again, and it works fine. Here's a bunch of the crash reports, none of them seem to be related: https://crash-stats.mozilla.com/report/index/6fc9eeab-98ac-423c-90b4-64e7b2140507 https://crash-stats.mozilla.com/report/index/414dbe0b-a534-4322-861f-4a7ad2140502 https://crash-stats.mozilla.com/report/index/efd04a6d-9120-4ece-becc-278a42140425 https://crash-stats.mozilla.com/report/index/29ac8ae4-f968-4643-844d-9ebb52140424 https://crash-stats.mozilla.com/report/index/5d5b622d-17bd-452f-884b-6d6f42140423 https://crash-stats.mozilla.com/report/index/6f1689db-90b7-4432-86ca-3e0ab2140417 I'm on Ubuntu 14.04 running awesomewm.

bhearsum, perhaps addon related? note 3 + 6 - https://crash-stats.mozilla.com/report/index/efd04a6d-9120-4ece-becc-278a42140425 https://crash-stats.mozilla.com/report/index/6f1689db-90b7-4432-86ca-3e0ab2140417 - are not startup crashes

Possibly...though I think this has gone away now.