Speed up Firefox page loading time without using a RAM disk
It has been observed that the cache of Firefox can be moved onto a RAM disk. Instead of loading cached images and data from the hard drive, it loads from memory, which is a lot faster. It turns out, though, that Firefox can do this without using a RAM disk — you can simply do it with about:config.
Just follow these instructions — and don’t worry, if you mess it up, you won’t break anything.
* Type about:config into the address bar
* Type browser.cache into the Filter field
* Set browser.cache.disk.enable to false (double click it)
* Set browser.cache.memory.enable to true (double click it)
* Right click > New > Integer; type browser.cache.memory.capacity; press OK
* Type in 100000 (this is equivalent to 100 megabytes); press OK
* Close all Firefox tabs and windows, and then restart the browser
If you want more than 100 megabytes of cache — if you have lots of spare memory, or you’re prone to mammoth browsing sessions — type in 500000 instead for 500 megabytes of cache. To confirm everything is working, visit about:cache and you should see some ‘Memory cache device’ information.