How to create plugins/addons for firefox, IE and chrome

Question

I need to create plug-ins/add-ons for IE, firefox and chrome browsers for the following requirement:

If the url requested is in a particular format/ matching a particular regex pattern, the plugin has to block the request and pop up and alert box.

I have searched a lot but did not find anything helpful. For IE, I think we can create BHO for this purpose. But is there a way to achieve this using javascript?

Thanks in advance.

Regards, Maggi

Answer 1

Unfortunately, IE's addon development is still very arcane compared to Firefox and Chrome for the behavior you're trying to accomplish. You'll have to develop a BHO for IE whereas both Firefox and Chrome use Javascript as their addon platform.

http://www.enhanceie.com/ie/dev.asp is a great starting place for more information on how to develop extensions for IE.