add section about configuring JS console to show debug messages (#866)

* Add section about configuring JS console to show debug messages

* Rewrite log level section to be more concise

Author: gitname

README.md

@@ -241,6 +241,9 @@ setInterval(function(){
 }, 1200);
 ```
 
+In Chromium-based web browsers (e.g. Brave, Chrome, and Electron), the JavaScript console will—by default—only show messages logged by `debug` if the "Verbose" log level is _enabled_.
+
+<img width="647" src="https://user-images.githubusercontent.com/7143133/152083257-29034707-c42c-4959-8add-3cee850e6fcf.png">
 
 ## Output streams