I think it depends on what kind of programming you do, but mine are:
1. React Deverloper Tools
2. Redux DevTools
That's it. The rest is the native dev tools of chrome, but it's not an extension.
I really like to study programming but I also have some problems with studying and https://upxacademy.com/ do my assignment is the best resource where you can without any problems order any help in it. IT technologies are not understandable for all people and that is why I am paying a huge attention to homework.
Castofly