Is there a version of GreaseMonkey that prints ALL errors to the console, like if the UserScript was a real JavaScript?

Question

Is there a version of GreaseMonkey that prints ALL errors to the console, like if the UserScript was a real JavaScript? For example syntax errors?

Answer 1

I think the preference (about:config) javascript.options.showInConsole may control this. See Mozilla's tips on Setting up an extension development environment. It's not the same thing, but since Greasemonkey is an extension running in chrome, I think it's relevant.