User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:57.0) Gecko/20100101 Firefox/57.0 Build ID: 20170907220212 Steps to reproduce: Visited http://witt.zone/sage/ and https://www.breville.com/ Actual results: Not directly reproducable, but I’ve had three crashes with the signature mozilla::dom::ChannelWrapperBinding::get_channel in quick succession: https://crash-stats.mozilla.com/report/index/fe42fecf-ec40-4f0b-b318-62e4b0170908 https://crash-stats.mozilla.com/report/index/6ef4a9c9-5bc2-45cd-8047-0dd170170908 https://crash-stats.mozilla.com/report/index/c3e31286-86e9-4693-adf9-f6f770170908 They took down the whole browser, not just that tab. Expected results: No crashes. It could be specific to this site, but I haven’t seen this before and I’d just installed todays nightly so maybe a recent regression?

Possible dupe of https://bugzilla.mozilla.org/show_bug.cgi?id=1398045 ?

OK, found a page that triggers this crash on load: https://thegeekygaeilgeoir.wordpress.com/2017/09/06/even-racists-got-the-blues/

(In reply to Robin Whittleton from comment #1) > Possible dupe of https://bugzilla.mozilla.org/show_bug.cgi?id=1398045 ? Yeah this looks like a dupe of that.