With Chrome Extension CLI you can built any of the below extensions:
With Popup extension you can add features to Active Tab.
A counter extension that maintains it's count value across tabs.
With Override page extension you can override default page like New Tab, Bookmarks, or History page.
A dashboard extension that displays time by overriding Chrome's default New Tab page.
With DevTools extension you can add new features to Chrome Developer Tools.
A React Checker extension within DevTools that checks whether a page is using React or not.
With Side Panel extension you can add new features to Chrome Side Panel.
A side panel extension that provides a list of all open tabs in active window.