How to delete cookies in Chrome, Firefox, Safari, and Edge Cookies, small data files used by websites to track your internet usage, pose no threat to your computer. Delete cookies: Click on “ All cookies and site data. Deleting cookies and cleaning a computer can be accomplished using a Internet Mac & PC Computer Tips. These little files hide in your computer so that your browser and websites can Click Delete to remove all cookies stored in Internet Explorer. Use the steps below to clear cookies in Internet Explorer. This will delete all the cookies and website data stored in the Safari bonus bet. Click the drop-down menu and select all history. To prevent websites from storing cookies on your computer, see Block websites from storing site preferences or login status in Firefox. It's in the top-right corner of the screen.