From the History menu, select Clear Recent History. If the menu bar is hidden, press Alt to make it visible.
From the Time range to clear:
From the Opera menu, select Settings, then Privacy & Security, and then Clear browsing data....
In the dialog box that opens, from the "Obliterate the following items from:"
drop-down menu, select The beginning of time.
Select the following:
From the Safari menu, select Clear History... or Clear History and Website Data....
Select the desired time range, and then click Clear History.
Go to Safari > Quit Safari or press Command-Q to exit the browser completely.
The steps to clear your cache, cookies, and history may differ depending on the model of your Android device and your preferred browser, but you should be able to clear your cache and data from your application management settings menu: