Security researcher Spandan Veggalam reported a crash while using the debugger API with SavedStacks in JavaScript. This crash can only occurs when the debugger is in use but may be potentially exploitable. Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1192401 External References: https://www.mozilla.org/en-US/security/advisories/mfsa2015-102/
Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Spandan Veggalam as the original reporter.
This issue was fixed in Firefox version 41.