Enable Debugging in Visual Studio when browsing silverlight in Firefox

Following is the tips/Trick to ensure that the VS debugger attaches to the Silverlight app for debugging and your unreached breakpoint can be reached:

1. In Firefox address bar type about:config

2. Read the warning, choose your preference to always remind you     or not and accept
3. In the search bar of the config options now type: npctrl

4. You should then see the entry:    dom.ipc.plugins.enabled.npctrl.dll

5. Change the value from true to false (simply double-clicking will change this for you)
6. Restart your Firefox