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 very much Philipp

bp-e69eb341-b663-4d76-8a06-c7ece2160403 4/3/2016 9:56 AM bp-efa46026-9c40-48eb-802c-228062160402 4/2/2016 6:20 PM bp-3e363eea-5fb3-4ae7-be14-766122160402 4/2/2016 3:13 PM bp-e9fa6683-77f0-4587-a1d1-f4b022160402 4/2/2016 3:13 PM bp-a8deddff-b372-4563-b5f1-6ef872160402 4/2/2016 9:37 AM bp-16009023-13b4-4af7-954b-182c42160402 4/2/2016 9:23 AM bp-f54940cb-323c-4041-9389-2abbd2160402 4/2/2016 8:44 AM bp-04703374-cc94-4c88-8775-fc6a72160402 4/2/2016 7:56 AM bp-fc3f1947-537b-4a1f-9183-953e52160402 4/2/2016 7:54 AM bp-bc6adcea-f83b-4a2a-b7ef-683eb2160401 4/1/2016 5:32 AM

thank you, unfortunately those crashes appear to be caused by trusteer rapport which is running on your device and hooking into firefox - please check that you are fully updated there or temporarily disable/uninstall that software for the moment.

please also get in contact with trusteer's support which are usually very quick to respond and fix issues like this: https://trusteer.secure.force.com/PKB/articles/en_US/FAQ/browser-crashes

thanks so much - i'll try updating that and see if it works. much appreciated.