In this course student will learn how to extend or modify WebApps with the use of JavaScript, HTML & CSS. As an example we will use facebook(dot)com to show just how powerful WebExtensions are. Student will learn to remove elements from the page and add new once. As an example we will remove suggested posts which mostly are unwanted ads. This course uses HTML, JavaScript and CSS to do all the work. Some basic info is stored in JSON files and those will be explained as well. In no way is this course an exhaustive explanation of HTML, JavaScript and CSS but it will show you how to approach such an project.HAVE FUN!!!