Chrome extension Rewrite

I have this Chrome extension: [login to view URL] You can view the extension demo here: [login to view URL] It is quite old based on simple JS, runs locally, and the only integration is with Bitly authentication/API and Google Analytics. We need to re-write it in React.js with a new design (Invision) There are no new features to be implemented. List of Current features: - Fetch the current URL automatically. - Choose preset to fil form quickly - Create/edit/delete presets - Set preset as default - Remember chosen preset for X minutes. - The final URL includes a set of parameters with the values from the form. - The final URL can be created without form values. - The final URL can be edited. - Docked version as an alternative for the popup screen. - Clipboard Copy- parameters only button - Clipboard Copy Final URL button - Bitly integration - The user goes through authentication. - Bitly error handling based on several scenarios - Google Analytics integration - sends data about errors and bugs. - Force lowercase for final URL Important! Notes for developers: - The developer must know how to work with Invision to take the designs. no PSD/HTML/CSS files will be given. The design is pretty much like the current one. Youll get the final design plus all the items library for button states, dropdowns, shadows, etc. - The project will be managed by milestones only, for each the developer will set a fixed price based on his/her hour's estimation and based on the design/requirements we send for that milestone. We do not manage projects on an hourly basis. - Please set your hourly rate in the proposal. Proposals without an hourly rate will be ignored. - Please point your relevant projects