Custom Browser Plugin /Autofill form Add-on Developement

We need a web developer who can create some custom browser plugins/add-on for us that will integrate with our web server, so our team can use the browser plug-in to insert data in multiple sites at one time. We are facing few problems with the exiting auto-fill form add-on: • When the data file is imported, the values get imported in profile 1, but the same values/data are not able to use for many sites. It gives all wrong values. We also need few features to be added on the existing Firefox add-on: • Upload button to import xls file with all the data • Adding extra fields for the plug-in to save information(We will provide the fields) • It should able to parse all the data from the xls file. We will provide you further details for the selected contractor. This is an urgent task. Thank you.