firebug took a while to have a proper javascript debugger. For a long while, you could only ever have breakpoints using IE+VS... But it was a crapshot if your c

firebug took a while to have a proper javascript debugger. For a long while, you could only ever have breakpoints using IE+VS... But it was a crapshot if your code had too much DOM interaction. The debugger itself would crash (and offer you to debug itself heh)