Useful Stack Trace

Useful Stack Trace is a Firefox (23+) addon that provides useful informations when a error has been thrown without being caught.

Useful Stack Trace makes use of th Debugger API and will slow down your webpages. For that reason, for it to be enabled and tracking running programs, two conditions need to be met:

Once both conditions are met, go to the test page, click the "run" button and look in the web console to see if you can see the stack trace.