hi kevinlillard, the reports show different crash causes - one relating to d3d11 accelerated media playback and one relating to webgl. the first issue should be fixable when enter '''about:config''' into the firefox address bar (confirm the info message in case it shows up) & search for the preference named '''media.windows-media-foundation.allow-d3d11-dxva'''. double-click it and change its value to '''false'''. the second issue should be fixed in firefox 50, which is scheduled to be released this tuesday, or you can download it right now as beta version: https://www.mozilla.org/firefox/channel/