A support docs is cleanly defined here : http://mzl.la/14Ad7Md 

Hi Can you post some of recent crash report from '''about:crashes''' . It starts from ''bp-'' keyword . However you can try several steps Like : * Disable "hardware acceleration in Flash" by [https://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues This help page of flash] > RClick on Adobe flash player logo > settings > Click on the icon at the bottom-left of the Adobe Flash Player Settings window to open the Display panel. * Remove the check mark from Enable hardware acceleration. > Close popup > Restart firefox . A support docs is cleanly defined here : http://mzl.la/14Ad7Md Note : The adobe help page is even consisting some helpful steps.