iMacros Script OR Chrome Extension for Facebook Automation

Needed: Script to ORGANICALLY simulate the activities of person on Facebook using Chrome browser. Activities to simulate: checking/responding to any messages. Checking friends page status. Checking/viewing/commenting on random posts in newsfeed, etc. Script/Extension MUST work with different sized windows "out of the box" without extensive configuration. Script/Extension MUST be dimension/location independent and make use of HTML classes/IDs for identification (rather than x/y coordinates). To prove you have read this, please include these words in your proposal verbatim: "I understand what you need, Tom."