We have been meaning to get around to looking into this on my current project but haven't yet: I believe the browser's error event will return a column number.
> Column numbers in Firefox. Firefox is the only browser that doesn't support column numbers for exceptions. This makes debugging minified javascript essentially impossible. I've sent one patch but there's a lot more to do.
https://bugsnag.com/blog/js-stacktraces/
- written in 2014
but MDN now says:
> Column number for the line where the error occurred (number) - Requires Gecko 31.0
https://developer.mozilla.org/en-US/docs/Web/API/GlobalEvent...
If anybody has live experience with this, I'm eager to hear about it.