To make Firefox faster is to store the whole profile folder into a Ram Disk.
RamDisk in Linux are called TmpFS. You can also use shared memory folder /dev/shm if you have it in your fstab.
This post in the gentoo forums explains how to do it in Gentoo linux.
I made a similar script to make it work in OSX Leopard.
The Script have 2 parts, Start.sh and Stop.sh
Here are the Scripts:
You can also use ‘tar’ instead of ‘rsync’. I just love rsync more.
* Warning: The ramdisk contents will be erased after you umount the ramdisk.
To speed up firefox even more run these commands: