Chrome browser extension

I need a cross-browser plugin developed. The general logic of this plugin is already completed, and will be provided to you on contract acceptance. It's about 70% written. What I need is for it to be finished. New code that will need to be written: HTML popup interface that displays when the user clicks on the extension's badge. This HTML will be populated with data from IndexedDB about the site loaded in the current tab. Cross-browser compatibility. The POC is written only for Chrome. My preferred method of development is to hammer out all the fine details on Chrome. Once the fine details are completed, you can then do the minor changes needed when using WebExtensions to make the plugin work on Edge, FF, and Opera. However, I also need it ported to Safari. How it works: When the plugin is installed, it loads data from a json file to IndexedDB, using localforage to read and write. This code is already written in the POC. When a browser hears an onActivated or onUpdated event, it then queries data stored in IndexedDB which then will be used to change the badge icon, badge text, and badge background color based on the data retrieved from IndexedDB. This code is already written in the POC. If a user wants more information, they can click the badge icon and get an HTML popup that shows data pertinent to the site they are visiting. The data will be retrieved from IndexedDB and populated into this HTML page. The HTML page needs to look similar to a nutrition label (I'll provide examples), and allow for an arbitrary amount of custom rows, based on what's stored in the DB. This code is not written. There also needs to be a overlay on the website's main frame, in the form of a small circle that contains a piece of data from the database, similar to the plugin Ghostery's purple circle shows the number of ads blocked. The overlay will fade out after 10 seconds.