GitHub → https://goo.gl/RBcFK8 Test page → https://goo.gl/IEXS2y
--- FEATURES ---
✔ Change extension icon color in toolbar when JavaScript error occurs ✔ Show error icon in bottom right page corner ✔ Show errors details by click on toolbar or notification icon ✔ Error source URL in popup is clickable ✔ Show errors details in notification popup ✔ Show errors stack traces ✔ Show errors column number ✔ Error source in notification popups is clickable ✔ Does not overrides user-defined error handler ✔ Handle console.error() calls ✔ Handle missing js/css/other missing files 404 errors ✔ Ignore 404 errors initiated by AdBlock and etc ✔ Ignores repeated errors ✔ Ignores Google Chrome extensions internal errors ✔ Error text is linked on StackOverflow search ✔ Copy errors details to clipboard