Chrome extension to connect to google spreadsheet

Your task is to create a google extension, which will connect to google spreadsheet and read data. This data from spreadsheet will contain facebook login. The extension shall automatically paste the copied login data to facebook login form, once current url == [login to view URL] (if $current_rul == [login to view URL], read data from google spreadsheet and paste to the login form). The extension shall have on/off button and a possibility to change google spreadsheet url, from which the login info shall be copied.