Firefox not responding solved in Windows
If your firefox in windows PC is showing the below warning
"Firefox is not responding Please restart firefox or try to open firefox after restarting system"
just do this.
Then in the folder remove the file "parent.lock"
Now open your firefox and browse
PS: 1. "If you are unable to delete the file ; just click ctrl + alt + del .The task manager is opened. In that select the process tab and click on firefox.exe and just click the button end process "
2. *** represents that there can be any name