Check out the Postman Legacy Repo, which is available on GitHub.
https://github.com/postmanlabs/postman-chrome-extension-legacy/tree/develop/chrome
They used the following technologies
JS Framework: AngularJS CSS Framework: Bootstrap Template engine: DOM handle: jQuery, jQuery UI and many other jQuery plugins. Other: vkBeautify, Underscore, and many others.
Outline about the Chrome extension. This is a chrome plugin that is built with manifest.json (configuration file) and the Chrome API.
You can include your HTML, JS and other JS library or Framework according to the extension scope.
How to create a Chrome plugin?
1. Enable developer mode 
2. Download the extension 
Finally, once you’ve finished developing extensions, you can pack it as a CRX file to upload it to the Chrome Web Store using the package extension button
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