This may fall into the category of "so obvious I'm the only one who didn't get it", but I just had to share it. I'm preparing a blog post where I've got an intentional error in my JavaScript code. I noticed that it wasn't showing up in the Firefox console, though. I added a console.log message before the error and it showed up--but my error never did.

Check out the screen shot below:

Notice that CSS warnings are showing up, which is cool, and "1" is my console.log message. But my JavaScript error isn't there. I clicked the console drop down to see what options were there:

Yep - logging of errors is enabled. So what the heck? Turns out I had to also check the options on the JavaScript tab:

Ugh. I can't imagine why "Errors" would be turned off, but maybe it's a sensible default for some reason. That complaint aside, I have to say I really like the look of the console.