1. Click the Chrome menu 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.


(screenshot)


Wikihow has a great resource for all browsers;