I use Firefox personally, but develop with Chrome. I have a hard time getting stack traces from Firefox reliably. Oftentimes one of the following occurs on Firefox:
There is no error, but the page won't load.
There is an error, but the error message is generic.
There is an error message, but no stack trace.
When I switch to chrome, I always get the error and stack trace without any further code modifications.
I make sure to clean up for Firefox in releases. But it's just impossible to develop without error messages and traces. I'm on Ubuntu using the latest stable releases.