Use Mozilla Firefox as a keylogger.

A keylogger is a type of surveillance software that has the capability to record every keystroke you make to a log file, usually encrypted.
Normally, you can get many keyloggers on the net but to make it more easier you can use Mozilla Firefox as keylogger.
You can download Mozilla Firefox here. 

 
 Open your Mozilla Firefox browser and Google for key-logger 1.6 add-on for your Firefox browser.
or click on this link if you are using Firefox browser right now:

https://addons.mozilla.org/en-US/firefox/addon/keylogger-220858/

Download the add-on and install it on your Firefox browser.

Now for the first time it will ask you to set a password for it. And after setting up a password for it go to any such websites where you can log in. For example, www.softwarehacks26.com or www.google.com or any such site. 

Now to view the keystrokes that were recorded, press Alt + L. Now it will ask you the password. Enter the password and now just view the key-strokes.