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According to Microsoft's privacy statement:

To enable Cortana to provide personalized experiences and relevant suggestions, Microsoft collects and uses various types of data, such as your device location, data from your calendar, the apps you use, data from your emails and text messages, who you call, your contacts and how often you interact with them on your device. Cortana also learns about you by collecting data about how you use your device and other Microsoft services, such as your music, alarm settings, whether the lock screen is on, what you view and purchase, your browse and Bing search history, and more.

A lot of the things listed are pretty intrusive, but I want to focus on the bold last part. The privacy statement explicitly says Cortana tracks your browsing but is pretty vague on the details.

Does Cortana track your browsing live, or just scan the history? Does it track my browsing only if I use IE/Edge? Or does it track me when using Firefox/Chrome too? What if I use private/incognito browsing modes? Does it still track me?

Even if I used the Tor browser, there's no technical reason Cortana couldn't still track me. Does it?

closed as primarily opinion-based by schroeder Jul 30 '15 at 16:06

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • This will be very difficult for us to answer. This is more of a Microsoft question since Cortana is still so new. – schroeder Jul 30 '15 at 16:06
  • At least the Tor part is interesting and i think we should discuss it jere ( i.e a local software is able to track you while on Tor) and i don't think its opinion-based – Freedo Jul 30 '15 at 19:23
  • @schroeder How is this opinion-based? I asked specific questions that have objective yes/no answers. Just because it's "difficult"? – AlliterativeAlice Jul 30 '15 at 21:05
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    Well, unless you can convince Microsoft to release Cortana's entire source code base (and somehow verify it's real), it will be based on speculation and opinions. – childofsoong Jul 30 '15 at 21:30
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    @soong The source code argument is moot, otherwise every question regarding closed source software would have to be closed. Yes, often "is it secure" can only be answered with "no" for closed source software, not with "yes" (generally hard to answer yes), but I think answers which collect facts and observations would be useful, just like a simple "there is an entry in the system settings for this", or "every time i type into tor browser's search bar, I see in wireshark a request to cortana.microsoft.com" – user10008 Jul 31 '15 at 5:05