my name is sahil.am also a part of a freelancer.com and canva.com.me and my team work for a form filling or android app development. i have a at least 4 years experience bout it.Web Developer is an extension for Mozilla-based web browsers that adds editing and debugging tools for web developers. It has been tested to be compatible with Firefox, Flock, and Seamonkey. The extension was developed by Chris Pederick, who has also authored the User Agent Switcher extension.