Setting Up Internet Explorer Cache
Setting your cache insures that your maps and data will always be the most recent available.
In Internet Explorer, go to Tools>Internet Options
In the Internet Options dialog box, on the General Tab, click on the Settings.

Make sure the radio button next to Automatically is selected.

Click OK.
Setting Up Mozilla Firefox Cache
In Mozilla Firefox, go to Tools>Options>Privacy.
Select:
Use custom settings for history
Check:
Clear history when Firefox closes
Select:
Settings

On this page check:
Cache

Click
OK
Top of Page