To clear the cache in any of the browsers, press the keys CTRL-SHIFT-DEL (COMMAND-SHIFT-DEL on a Macintosh). This brings up the clear cache page in the browser so you don’t have to hunt where the latest version moved that menu option. If that doesn’t work for some reason, here are browser specific instructions.
How to clear the cache and cookies from Mozilla Firefox 4.0 or any newer version:
For additional information see: Mozilla – How to clear the Firefox cache
How to clear the cache and cookies in Google Chrome, version 19 and above:
For additional information see: Google Chrome
How to clear cache and cookies in Safari 8.0 or newer: