If you click "history" button you should see date-wise buttons matrix of history stored on your browser. Duplicated URLs or website visited 2nd or more times are excluded to reduce the cluttering. You have the option to clear/remove/delete individual button by clicking on red button with an x mark on it. The "show all" button restores the cleared buttons. THE "clear browser history" BUTTON NEEDS TO BE USED VERY CAREFULLY. CLICK IT ONLY IF YOU NEED TO CLEAR BROWSER HISTORY NOT ONLY ON THIS WEBPAGE BUT ALSO FROM YOUR BROWSER ALONG WITH ALL STORED USER NAMES AND PASSWORDS.