Chrome&Mozilla Extension Developers

Hi Friends, I need a extension for my website in google chrome & mozila .... My Requirement : 1.)If he install the app we should show him a side notification bar when ever he opens any website. 2)You need to fetch top 20 posts and display in the left sidebar and in the right sidebar you need to give all the categories list. 3.)He Should have a option to close .. Please Only Interested People who can deliver this successfully bid. Regards, vishal