How to Delete Browser Cache and History
Deleting browser cache and history sometimes helps when a page cannot be accessed. For information security reasons, it is also advisable to delete browser cache and history after online banking or online shopping on a public workstation.
http://www.refreshyourcache.com/en/home/ has intrusctions for other browsers too.
Firefox
The easiest way of emptying browser cache, no matter which Firefox version you are using, is by pressing the shortcut Ctrl+Shift+Del (on mac use Cmd+Shift+Delete) which opens the window below. The recommended time range for deleting history is Everything. You can leave out the Saved form info option if you want to keep your saved data for forms.
By clicking on Clear all selected items are deleted.
Edge (Internet Explorer)
The same shortcut Ctrl+Shift+Del works also in deleting Edge history.
The recommended time range for deleting history is All time. You can leave out Passwords and Autofill form data option if you want to keep your saved data for forms and
By clicking on Clear now all selected items are deleted.
Google Chrome
Chrome will also comply when you press Ctrl+Shift+Del (on Mac, Cmd+Y or select Show Full History from the History menu). Set the time range to All time. You can leave out the Autofill form data option if you want to keep saved information for to forms.
By clicking on Delete from this device all selected items are deleted.
Safari 5
In a Mac Safari browser, history is cleared by selecting Reset Safari in the Safari menu.
NOTE! The image is from an old version. Contrary to what the image shows, make sure that all checkboxes except Autofill and Passwords are selected.
By clicking on Reset all selected items are deleted.