Ask HN: Best Mac browser for web development

I really like Safari for my daily browsing but the development tools are not what I am looking for. Two problems with them: 1) it occasionally stops being able to evaluate expressions in the console and 2) it doesn't appear to have a way of automatically accessing event listeners.

So what is the best option? Firefox or a Chromium browser? And if Chromium is there a version of the FF Deve edition for Chromium?