Kernel start fails when using --browser argument

[jason-curtis]

repro steps:

1. Start ipython notebook with browser flag:
   • $ ipython notebook --browser firefox
   • Note that this successfully starts the notebook in firefox instead of the default browser
2. Open/create a notebook document
3. Wait for kernel to start

What I expect to see:
everything should just work :)

What I see:
A "Kernel restarting" dialog opens in the browser window for a little while, and finally switches to a "Dead kernel" dialog.

The console log shows evidence of attempting to restart the kernel, ending with the following:
[IPKernelApp] CRITICAL | Bad config encountered during initialization:
[IPKernelApp] CRITICAL | Unrecognized flag: '--browser'
2014-04-11 15:58:30.172 [NotebookApp] WARNING | KernelRestarter: restart failed
2014-04-11 15:58:30.174 [NotebookApp] WARNING | Kernel 218d6d1f-0779-42b8-802f-5b3df58bc919 died, removing from map.
ERROR:root:kernel 218d6d1f-0779-42b8-802f-5b3df58bc919 restarted failed!