Re: Fullscreen Youtube in Firefox Crashing
Clearing the cache in the browser has helped for me, a little. Other than that, it can be because running the video in full screen mode stresses both the CPU and the GPU and therefor if you don't have the necessary cooling in your case, that it causes freezes.
Originally Posted by d4m1r
Other than the above, there could be something with the graphics driver as well.. Different versions of Ubuntu uses different versions of the nVidia driver which can explain why it works worse with the new version of Ubuntu, but it's really hard to tell exactly what the problem is.
To be sure that the issue has nothing to do with the Firefox web browser, you can try with other web browsers to see if it causes the same effect as from you have experienced here. Try Chrome would be my advice, it has flash inbuilt and does not use the version which you have installed in your Ubuntu system from what I know.
Debian 8.0 "Jessie"
HP laptop (15-ab064no-Nordic)
Linux user since 1999.