How to edit JavaScript code directly in FireFox?

Question

JavaScript

in debbuger it is possible to put breakpoint and to look at variables. But if you need to change the existing code, what should you do?

Answer 1

Better switch to vscode
https://code.visualstudio.com/blogs/2016/02/23/int...
and you don't have to mess with editing the code in the browser. There you can set breakpoints and see variables and hot reload through some kind of webpack to configure.

Answer 2

https://jsfiddle.net/
https://codepen.io/
or an IDE with good browser integration
https://www.jetbrains.com/webstorm/