If you wish to wipe your Facebook messages clean, there is more than one way to get it done. Facebook chat has a way of filling up your inbox, making it full of junks you may never read. Normally, there should be a special folder that stores chat messages but Facebook doesn't leave that option and worse yet, there's absolutely no way to mark all messages and delete them collectively. Whether your favorite browser is Mozilla Firefox or Google Chrome, there are different tweaks to get this done. 1. Using GreaseMonkey script on Firefox - Install GreaseMonkey Firefox addon and restart your browser - Now go to userscript.org and install this script - When the script is installed, go to ...Read more