Help & Support

Chrome:
Go to the top right and click the three little dots.

Select Settings.
Top left click History and then click Delete Browsing History…and then select cookies and cache
items to delete.  (you can leave Passwords un-ticked).
Close Chrome and then re-open.

Firefox: 

Go to the top left and click the three little lines.  

Select Options. 

Left hand side click Privacy and then click "clear all current History".

From the dialog box select all items and click Clear Now.

Safari:

press ⌘ Command + R

If you would like to clear all the caches or parts of it, complete the following steps;