I use 16.04 beta to the release version. Nothing seems to work at all.
It keep crashing!
Browsers cannot even play youtube!
It’s horrible!
I find using it very frustrating!
How am i going to do my work when everything fails!
I use Mate 1.14.1 on Ubuntu 16.04 now, with upgraded Pi kernel 4.4.14-v7+ on Raspberry Pi 3, fast and perfectly stable! No crashes yet… I understand your frustration. I hate it when stuff doesn’t work.
Perhaps you could drop the beta, create a new microSD image and retry?
For youtube, now see