Created: 2012-03-25 01:26
Updated: 2013-10-26 19:44

Text Readability Scorer - Experimental Firefox extension - v0.1

Author: Thiyagaraj Krishna - / Twitter


This is an experimental firefox extension that I created during the Mozilla Developer Network Hackday on 24th March 2012 in New York City. It displays the reading scores for the following formulae:

##Build Instructions

  1. Download the Mozilla Firefox Add-ons SDK

  2. Download the readability director into a place where you can activate the SDK and get to the command line(platform specific instructions will be in the SDK)

  3. Enter "cfx run" in the command line while in the "readability" directory (SDK commandline)

  4. It should launch an instance of the browser with the plugin loaded

  5. Navigate to any webpage, wait until it loads, and then select some text,right-clicking should bring up the "Calculate Readability" menu item which would launch the scores in a "panel".

    NOTE: The tests in the test suite are the default tests and not updated for this code :) Please ignore. Also in its current iteration, it doesnt use any HTML5 and is a bare-bones basic HTML+JS app utilizing the Add-on API


Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version 
1.1 (the "License"); you may not use this file except in compliance with 
the License. You may obtain a copy of the License at

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the

The Original Code is text-readability-score.

The Initial Developer of the Original Code is Thiyagaraj Krishna.

Portions created by the Initial Developer are Copyright (C) 2010
the Initial Developer. All Rights Reserved.

Portions of this software is adapted from Dave Child's PHP Text Statistics, /


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