| If you have problems with watching videos in fullscreen (youtube or other) Go to terminal and type: Code sudo apt-get remove swfdec-mozilla mozilla-plugin-gnash adobe-flashplugin flashplugin-nonfree Now install flashplugin-nonfree
Code sudo apt-get install flashplugin-nonfree Now create new directory /etc/adobe
Code sudo mkdir /etc/adobe Create new config
Code echo "OverrideGPUValidation=true" >~/mms.cfg Them move this config file to created folder
Code sudo mv ~/mms.cfg /etc/adobe/ Restart firefox and go to youtube and play video in fullscreen
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