Agreed, the browser plug-in/extension is the way I would like to go. You're right in that you couldn't expect web developers to integrate anything and with that

Agreed, the browser plug-in/extension is the way I would like to go. You're right in that you couldn't expect web developers to integrate anything and with that method, they wouldn't need to. I actually have an extremely basic proof of concept going using Chrome Extensions, XML and jQuery. If I decide to keep going with it, then I would need to start looking into targetting Firefox, Safari, IE as well.