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Internet Explorer

1. Click Tools .
2. Click Internet Options.
3. On the General tab click Delete in Internet Explorer 7 and 8, and Delete Files in Internet Explorer 6.
4. In Internet Explorer 7 and 8 click Delete all... in Internet Explorer 6 click Delete Cookies..., Delete Files..., and Clear History.
5. Close all open browser windows.

Firefox

History/Online Storage Cache

1. In Firefox click Tools.
2. Click Clear Recent History.
3. From Time Range to Clear choose Everything.
4. Click Clear Now.
5. Close all Firefox windows. 

Offline Storage Cache

1. Open Firefox
2. Click Tools
3. Click Advanced
4. Click the Clear Now button
5. When the clearing process has completed click OK
6. Close All Firefox windows.

Google Chrome

1. Click the Chrome menu  on the browser toolbar.
2. Select Tools.
3. Select Clear browsing data.
4. In the dialog that appears, select the checkboxes for the types of information that you want to remove.
5. Use the menu at the top to select the amount of data that you want to delete. Select beginning of time to delete everything.
6. Click Clear browsing data.

Safari

1. Click Safari.
2. Click Empty Cache.
3. Close all Safari windows.