The Netscape browser witnessed the fall of JavaScript in the late 90s and early 2000. The face of web development was maturing, but very few were still interested in investing in JavaScript.
It was the advent of the Mozilla foundation that released the first open source browser, Firefox, in early 2002-2003 since the base was the successor of the former Netscape browser. They employed JavaScript again within their product. In 2004, Google introduced Asynchronous JavaScript and XML (AJAX). This led to the foundation of many techniques and made communication easy with a black and white frontend and server by minimizing the server calls.