Fedora SSD optimizations

As root:
fstrim --all
systemctl enable fstrim.timer

Firefox about:config:
browser.sessionstore.interval -> 1800000
browser.cache.disk.enable -> false
browser.cache.memory.capacity -> -1
browser.cache.memory.enable -> true

fstab:
#SSD optimization /var/log/ to RAM
none              /var/log/              tmpfs   size=10%                 0       0

#SSD optimization /tmp to RAM 
none             /tmp/                   tmpfs   size=10%                 0       0