By default Firefox puts its cache in the home partition.We can speed up Firefox and reduce disk writes by moving this cache intoif we have 2GB RAM or more.
1. Edit /etc/fstab,open terminal (Ctrl+alt+t or) from Applications->Accessories menu and type:
sudo gedit /etc/fstab
Add following into this file and close it:
tmpfs /tmp tmpfs noexec,defaults,noatime 0 0 tmpfs /var/tmp tmpfs noexec,defaults,noatime 0 0
2. Edit /etc/sysctl.conf:
sudo gedit /etc/sysctl.conf
add this line and save it:
about:config in firefox address bar and click
(I'll be careful,I promise!.) Right click on blank area and create a new string value called browser.cache.disk.parent_directory, set its value to /tmp
Now, reboot the system and experience the performance.