‘History’ and ‘Cookies’ don’t need to be emptied every time we empty the cache, though.

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[youtube=http://www.youtube.com/watch?v=R3QiOQplLrc]How to Clear Your Cache in Firefox (PPtv)

 RealPlanetInfowars Published on Dec 14, 2012

The new and updated PrisonPlanet.tv just launched and several of you are having issues with the website.
If you’re getting a ‘blank screen’ or an ‘invalid token’ message, clear your browsing history / cache and it should fix the issue.

[youtube=http://www.youtube.com/watch?v=6v81cbWF4G8]How to Clear Your Cache in IE (PPtv)

[youtube=http://www.youtube.com/watch?v=q8JglZKfmXQ]How to Clear Your Cache in Chrome (PPtv)

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To clear the cache in Safari:

You can enable the Develop menu to clear the cache if you don’t want to clear your history…

From your Safari menu bar click Safari > Preferences then select the Advanced tab.

Select:  Show Develop menu in menu bar

Now from the menu bar click Develop >  Empty Caches

(source)