This little extension listens to the JS functions such as console.log() etc., and then outputs everything to you as real-time notifications, directly on the webpage, without having to open the browser console. Find those errors before your customers do.
You can download the zip file below, to use for unpacked loading in Chrome://extensions
Bugs and enhancement requests can be made on the Github repo here:
https://github.com/rynaldos/js-console-err-notifier
The tool in action:
