Kicking things off... Maybe exposing Tracking Protection information could done by adding details to the `mozbrowserlocationchange` event. Maybe turning Tracking Protection on/off for a browser iframe could be done by setting a new `mozbrowsertrackingprotection` attribute.

Hi Kan-Ru, Ben Francis recommened that I ping you about this feature.

I found this `mozbrowsersecuritychange` event [1]. On the surface, it looks like what we need. I'll confirm if it's missing anything defined in the spec. https://developer.mozilla.org/en-US/docs/Web/Events/mozbrowsersecuritychange

I've done some testing with this event and found the following: - `details.trackingContent` - This value is always `false`. I tried going to some sites like WSJ, but was unable to get tracked :) And yes, I made sure that my Tracking Protection setting was turned off. Any tips on how to get this value to change? - `details.trackingState` - This value is always `undefined`. We need a way to turn Tracking Protection on/off per browser instance before we can fully exercise this. According to the UX spec we're supposed to display a list of the trackers found. I don't see this on Desktop v43 though. Does this data exist? Is this a valid requirement?

Reza told me on irc that he would take a look by himself.

Firefox OS is not being worked on