Write some Software

Hi i need a firefox addon made this addon will only be used for personal use and i will not need upgrades made because this will only be used for firefox version 51.0 i need a firefox addon that will auto close the proxy authentication dialog boxes or prevent dialog boxes from appearing because every time i use Zenmate addon proxy with firefox there is this box that pops up and request username and password whenever i try to access a website so can i pay you to make me a firefox plugin that will auto close the dialog and auto refresh the page? I sent a photo of what the dialog box looks like in attachment files.