Create a Google Chrome Extension

I need to develop a Google Chrome Extension (that will work on either Mac or PC Google Chrome) that can read from the current page a set of defined fields and create an ICS (Apple Calendar) file from that data that can then be imported into the apple calendar application. Similar extensions include the following: [login to view URL] [login to view URL] Important notes: 1) This must be a stand alone extension. It can not rely on any third party (or pre-existing extensions - Ie/ TamperMonkey). It must be able to function solely on the machine it is installed - no call home or write to a local/remote database then create the file. 2) An example of the field data to be pulled from the current page are: view:_id1:tabPanel1:_id22:aGiven11 (CLIENT FIRST NAME) view:_id1:tabPanel1:_id22:inputText1 (CLIENT LAST NAME) view:_id1:tabPanel1:_id22:inputText2 (CLIENT PHONE) view:_id1:tabPanel1:_id22:inputText3 (CLIENT MOBILE) view:_id1:tabPanel1:_id22:inputText4 (CLIENT EMAIL) 3) The pages to get the data from are on a secured server. For security reasons and client confidentiality, the developer will not be able to access the site directly. However, a sample HTML of a page can be supplied and/or remote access to a guest machine and controlled supervision to the site for testing via TeamViewer can be arranged. We can discuss the project in further detail should the freelancer agree and understand the previously mentioned stipulations.