If you had to do javascript development before [Firefox](http://www.mozilla.org) brought us the Javascript console… I feel for you.
I just finished working on some NCAA bracket Javascript [at work](http://www.ajc.com), and it was painful enough as is… I can’t imagine not having the console at my side.
The upside is, after the pain of initial development I cut the code back from 145 lines to 83 lines, and I could probably have cut it back further if I (used the/knew the) language (more often/better).
So, to any and all JS developers out there… if you’re not already using Firefox for development, then get [get downloadin’](http://www.mozilla.org/products/firefox/all.html).