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.

Thanks Philipp - here are several

Submitted Crash Reports Report ID Date Submitted bp-66bdf4b1-54d2-4d50-b518-5395d2160402 4/2/2016 9:19 AM bp-5c1e1dd7-3e85-45c8-9545-8649e2160401 4/1/2016 2:41 PM bp-ce54d490-e4db-4afa-8769-2256b2160401 4/1/2016 11:37 AM bp-64a05fc2-4111-4eef-bcd8-acba42160331 3/31/2016 4:29 PM 8da3f8ca-73d6-4816-a92d-10a1e8b2b6b9 3/29/2016 9:11 AM bp-8d2b0b96-efb7-4762-952e-7ca9c2160328 3/28/2016 12:56 PM bp-c6e88db3-ec31-4868-8be2-a1a502160327 3/27/2016 11:07 AM bp-f9824c19-8399-47d5-a3bf-6ee5f2160326 3/26/2016 7:32 PM bp-e420a4e5-7cd0-4578-8af8-e01992160324 3/24/2016 4:49 PM bp-33eda826-31b9-4314-b9f6-502c22160323 3/23/2016 10:31 AM bp-04e595a1-bac5-4cc6-b19f-d8f812160322 3/21/2016 10:16 PM de6aca6e-571c-4955-a236-9ee750c235f8 3/21/2016 2:13 PM bp-024c6c3c-85b2-4225-a924-bfc4e2160321 3/21/2016 11:03 AM bp-4b9cb27a-285f-4500-9a15-615782160320 3/20/2016 10:29 AM

thanks, those all appear to be similar out-of-memory crashes and i'd suspect that one of your addons might be involved. you could either try to refresh firefox or manually disable a number of your addons and see if this is making a difference (i'd start to look at kaspersky's one in particular)...

Philipp, thanks for taking the time to look into this. I started right where you said and disabled Kaspersky and haven't had a crash since - I didn't even go through trying all the rest of the addons. I had recent;y upgraded from Kaspersky 2015 to 2016 Anti-virus so I'm guessing the "improved" product was the culprit.

Thanks again -