The size of your cache folder is usually limited to either a specific number of kilobytes or a percentage of the free space on your hard disk. Typically, cache sizes are set to around 5000 kilobytes (5 Megabytes), but the actual size can be adjusted in the preferences section of your web browser. You may want to decrease the size of your cache if your free disk space is low, or if you have a surplus of disk space, increasing your cache will enhance your web browsing speeds.

Your web browser may also have a "Memory Cache" which will keep some files in memory before they go into the folder on the hard disk. Memory cache is faster than disk cache but shouldn't be over used.