Suddenly every web page monetized with Google Adsense, Chitika or designed as a “Squeeze Page” may be useless to you for those firefox users with this add on – even if they wanted, for instance, what you’re offering.
Will this be a problem for lots of marketers? It’s hard to say at this point.
Just to be sure, John’s making sure his pages have html forms for email to make sure he’s not missing sign ups.
But if this script – or one like it – is on enough browsers, the “authority” sites that wanted to provide top quality affiliate link free information in hopes of getting pay per click revenue may find themselves victim to the sense that the “internet is free” and that people have a right to all your hard work whether you receive any compensation at all…