StumbleUpon

Pearltrees SearchPreview Greasemonkey Flagfox ReloadEvery Userscripts.org: Power-ups for your browser Video DownloadHelper IE View Lite Firebug JavaScript Debugger and Profiler Firebug includes a powerful JavaScript debugger that lets you pause execution at any time and see what each variable looked like at that moment. If your code is a little sluggish, use the JavaScript profiler to measure performance and find bottlenecks fast. Find scripts easily Many web applications are comprised of quite a number of files, and finding the one you want to debug can be a chore. Pause execution on any line Firebug allows you to set breakpoints, which tell the debugger to pause execution when it reaches a specific line. To set breakpoints, just click on any line number, and a red dot will appear to indicate that the breakpoint is set. Pause execution, but only if... Breakpoints can be troublesome if you find them breaking too often. To set a conditional breakpoint, just right-click on any line number. One step at a time Once the debugger is paused, you can continue execution one line at a time. You can also choose to step execution for more than one line. I break for errors