Intercept an HTTP request at browser end to alter some html content

Question

I would like to do as follows. What would be the best way? A general answer will also be fine.

I would like to intercept an HTTP request at the client end to alter some

Answer 1

A long time ago I've implemented this feature for IE using Plugable Mime Filters so after I've searched about it in c# here in stackoverflow I've founded this post that should help you start with it.

Hope this is useful for you.