Firebug is a boon to humanity. Seriously. The second it came out, it personally started saving me hours of work every single week. If you multiply that by th

Firebug is a boon to humanity. Seriously. The second it came out, it personally started saving me hours of work every single week. If you multiply that by the number of people working with the web, damn, that's like millions of hours? Billions? I think it was Vint Cerf who said something like: if you want to have the most profound effect on the world you can, rather than work on a particular problem, work on tools that help problems get solved and accelerate the process everywhere.