https://groups.google.com/forum/#!topic/mozilla.governance/81gMQeMEL0w They're not planning to collect URLs, just top-level+1 domains (e.g. images.google.com). And sure, there's no problem with images.google.com because it's generically innocuous. But what about pornhub.com for users in Saudi Arabia? Or some Japanese site that's essentially child porn for users in the US? The top-level+1 domain in many cases is totally incriminating. This is a horrible development. If Mozilla starts collecting this sort of data on an opt-out basis, it will put many users at risk. Seriously, WTF?