Your browser's cache to store the instantaneous state of each site you visit, this allows the browser to open this site faster next time you go there for the opening of the cached version, not the real. The real version will open only when the browser cache and compare both real all updates and alerts.

If the cache has been set at a great value, which obviously saved a lot of places visited.

The cache size is a personal experience setting up the FSB of the processor speed, RAM size and speed, HD speed.

Therefore, more the size of the cache of Mozilla Firefox? Sometimes it is necessary, you can cache more data and accelerate the navigation or you can extract the video and music to the cache setting so you can easily cache size to store large video files over 500MB with 200 or a few simple steps.

Tools --> Options --> Advanced--> Network

Now you can increase the size of the cache as show in below pic intially the size is default 50mb increased it to 1000mb/1gb

You can check the size of the cache and contents of the firefox cache by typing about:Cache in the address bar .

Now You can get the information as shown in the picture.