hello, could you provide your latest few submitted crash reports? please enter about:crashes into the location bar, copy the latest few report ids from there starting with bp- & paste them here into a forum reply. this will give us a better understanding what may be triggering those crashes.

Report ID Date Submitted bp-79e11d18-9a59-4a70-8d47-9ea181171017 17/10/2017 14:17 bp-d052435b-7733-4f7c-9573-6b4411171017 17/10/2017 11:58 bp-0b5b69a0-4987-446a-8d30-b55e01171016 16/10/2017 21:16 bp-4f2a48b4-e798-4000-8e52-3d0081171016 16/10/2017 20:54 bp-08bda8e3-53c0-4831-b6e8-cd94c1171016 16/10/2017 20:35 bp-fba02192-73bb-4f72-a8e7-00f461171016 16/10/2017 16:34 bp-0923e1d2-a7b6-4928-9b83-295741171016 16/10/2017 16:12 bp-eb8c07a6-5241-46aa-9d3c-d6c1d0171016 16/10/2017 13:08 bp-f58b8459-0a5a-4259-a6fc-d42d41171015 15/10/2017 23:09 bp-2bb0121a-595f-4de3-a27d-c7e721171015 15/10/2017 22:58 bp-ec5dbfa9-3488-4c24-9214-415190171015 15/10/2017 22:43 bp-b798e0e8-7d01-4982-988c-9c3991171015 15/10/2017 22:42 bp-7ba17e41-cc3c-4118-ba93-ad51b1171015 15/10/2017 22:42 bp-c3f3b955-6738-48ae-99a3-7e1bb1171015 15/10/2017 22:42 bp-b4a63e64-41ae-4ce9-a646-7ce341171015 15/10/2017 22:30 bp-c3c3a108-26e4-45c6-b2fe-074fc1171015 15/10/2017 22:28 bp-16c7d496-8489-47bf-8cab-bef551171015 15/10/2017 22:24 bp-5a5251f4-52a4-4f17-b3ab-1b3c41171014 14/10/2017 22:20 bp-c5101c1b-1ab9-486f-b9c9-dd70c1171014 14/10/2017 22:16 bp-b8c30d4e-fbdf-439b-b265-fe0380171014 14/10/2017 22:08 bp-a05c6713-d104-4e77-884c-1d0561170612 12/06/2017 17:47

thanks, the first crash in the list will receive a fix in the upcoming firefox 57, due to be released week. you could try it right now in the beta state: https://www.mozilla.org/firefox/channel/desktop/