Clean cache in Internet Explorer:
How do I clean the browsers' caches?
Select 'Delete Browsing History' from the Tools menu or press Ctrl+Shift+Delete and select 'Temporary Internet Files', then click the 'Delete' button.Clean cache in Firefox:
Open the Tools menu and select 'Clear Personal Data' (or whatever that looks likt that, my Firefox in in Portuguese)
Choose the necessary period for Time range to clear.
Open 'Details' and select 'Cache', then click 'Clear Now'